I'm not the first to think of this idea, but in my series of essays on self driving cars I thought it would be worth discussing some ideas on suspension.

Driven cars need to have a modestly tight suspension. The driver needs to feel the road. An AI driven car doesn't need that, so the suspension can be tuned for the maximum comfort of the passengers. You can start bu just making it much softer than a driver would like, but you can go further.

A big trend in systems operation these days is the use of virtual machines -- software systems which emulate a standalone machine so you can run a guest operating system as a program on top of another (host) OS. This has become particularly popular for companies selling web hosting. They take one fast machine and run many VMs on it, so that each customer has the illusion of a standalone machine, on which they can do anything.

If you have read my articles on power you know I yearn for the days when we get smart power so we have have universal supplies that power everything. This hit home when we got a new Thinkpad Z61 model, which uses a new power adapter which provides 20 volts at 4.5 amps and uses a new, quite rare power tip which is 8mm in diameter. For almost a decade, thinkpads used 16.5 volts and used a fairly standard 5.5mm plug. It go so that some companies standardized on Thinkpads and put cheap 16 volt TP power supplies in all the conference rooms, allowing employees to just bring their laptops in with no hassle.

Lenovo pissed off their customers with this move. I have perhaps 5 older power supplies, including one each at two desks, one that stays in the laptop bag for travel, one downstairs and one running an older ThinkPad. They are no good to me on the new computer.

Lenovo says they knew this would annoy people, and did it because they needed more power in their laptops, but could not increase the current in the older plug. I'm not quite sure why they need more power -- the newer processors are actually lower wattage -- but they did.

Here's something they could have done to make it better.

I'm a director of BitTorrent Inc. (though not speaking for it) and so the recent debate about P2P applications and ISPs has been interesting to me. Comcast has tried to block off BitTorrent traffic by detecting it and severing certain P2P connections by forging TCP reset packets. Some want net neutrality legislation to stop such nasty activity, others want to embrace it. Brett Glass, who runs a wireless ISP, has become a vocal public opponent of P2P.

Some base their opposition on the fact that since BitTorrent is the best software for publishing large files, it does get used by copyright infringers a fair bit. But some just don't like the concept at all. Let's examine the issues.

A broadband connection consists of an upstream and downstream section. In the beginning, this was always symmetric, you had the same capacity up as down. Even today, big customers like universities and companies buy things like T-1 lines that give 1.5 megabits in each direction. ISPs almost always buy equal sized pipes to and from their peers.

With aDSL, the single phone wire is multiplexed so that you get much less upstream than downstream. A common circuit will give 1.5mbps down and say 256kb up -- a 6 to 1 ratio. Because cable systems weren't designed for 2 way data, they have it worse. They can give a lot down, but they share the upstream over a large block of customers under the existing DOCSIS system. They also will offer upstream on near the 6 to 1 ratio but unlike the DSL companies, there isn't a fixed line there.

As many of you will know, it's been a tumultuous week in President Bush's battle to get congress to retroactively nullify our lawsuit against AT&T over the illegal wiretaps our witnesses have testified to. The President convinced the Senate to pass a bill with retroactive immunity for the phone companies -- an immunity against not just this but all sorts of other illegal activities that have been confirmed but not explained by administration officials. But the House stood firm, and for now has refused. A battle is looming as the two bills must be reconciled.

I've read studies that say that "chocolate" is the world's favourite flavour. That's not too surprising. Coming from central America after the Spanish conquest, the candy at least quickly was adopted all over Europe and to a lesser degree elsewhere. So did many other new world ingredients, such as corn, beans, squash, chiles, potatoes, vanilla, tomatoes, peanuts and many others. And we've seen many of these become common, and even essential ingredients in many overseas cuisines.

Rental car companies are often owned by car manufacturers and are their biggest customers. As cars get more and more computerized, how about making rental cars that know how to personalize to the customer?

When Hertz assigns me a car, they could load into its computer things like the dimensions of my body, so that the seat and mirrors are already set for me (simply remembered from the last time I rented such a car, for example.) If I have a co-driver, a switch would set them for her. The handsfree unit would be paired in advance with my bluetooth phone.

Fast internet access at home has spoiled me. Like Manfred Macx in Tourist I feel like I've lost my glasses when I'm a tourist. I get annoyed that I can't quickly and easily get at all the information that's out there.

When you call to get your voice mail, even from your cell phone, it typically asks for a PIN. There's a reason for that -- there is no authentication on Caller ID, and anybody can forge it. So if you don't require a PIN, and the voice mail let you in directly, anybody could listen to your voice mail or hack it in other ways.

As I've noted, with digital cameras we all take tons of photos, and the next task is to isolate out the winners. I've outlined better workflow for this and there are still more improvements we need in photo management software, but one task both cameras and photo management software could make easier is eliminating the plain bad shots.

I put pens in my pockets. However, sometimes I put them in without caps, or I put in retractable pens without retracting them to keep the tip inside.

The result, as all who do this know, is from time to time a pen leaks out and ruins a pair of pants, sometimes more than that. It's expensive, and hard to solve. Since the earliest days the badge of the nerd has been the shirt pocket protector, but I put them in my pants. You could try tyvek pocket liners, I suppose, but it's hard to see how to easily add them.

eBay has announced sellers will no longer be able to leave negative feedback for buyers. This remarkably simple change has caused a lot of consternation. Sellers are upset. Should they be?

As I noted, at DLD Lufthansa had a contest (which I won) for suggestions on how to innovate to compete with trains. They set the time horizon out 15 years, which really means a lot is possible, so while I mostly threw in ideas from this blog which are short term, I put in some longer term ones too.

One was the equivalent of "multi modal transport." To do this, you would build new short-haul planes which consisted of an empty shell, like the cargo planes you have seen where the nose hinges up, and cargo modules are slid in on rails. This would be combine with "passenger modules" which can slide into the shell, and which can also slide into a special rail car. There might be one module on a plane, though it is also possible to have several.

Passengers would board a train normally at the train station. Then, as the train moved to the airport, they could move to the passenger module car. They would place their luggage onto a belt to put it down low into the luggage module (under the passenger module) or be assisted by a porter. They would enter the passenger module, stow their carry-ons and otherwise get ready in their seat. By the time the train got to the airport, all passengers would be in their seats, belted and ready.

The train would split up into different cars if there were several flights on it, and each would move to a terminus where the plane-shell was waiting. Yet to be invented technology would laser-align the train and the parked shell in advance, and then the passenger module would slip into the aircraft hull on special rails. Connecting passengers could board the train at the airport before it moves to the hull, and their bags could be loaded into the bottom the standard way. (Though this is for short-haul flights, so there may not be connecting passengers.) An automated system would connect power, data and air venting on the passenger modules. Water/sewage would be self-contained and processed at the train station. Catering would probably be handled there too.

The nose would come down, the pilots board via their own door and takeoff would begin shortly.

I'm back from my German trip, which included the DLD conference and a bit of touring in Austria and Bavaria. DLD was a good crowd of people and speakers, though the programming was a bit of a mishmash. I'll have some nice photos up soon.

A couple of weeks ago many wrote about the mistakes of spock which made us call them the "evil spock" for the way they had you mass mail your friends by fooling you into thinking they were already users of Spock.

Bruce Schneier has made a fuss by writing about how he leaves his wireless internet open. As a well regarded security expect, how can he do this. You'll see many arguments for and against in his posting. I'll expand on one of mine.

Part of Bruce's argument is one I express different. I sometimes say "Firewalls are a hoax." They are the wrong choice for security, but we sell them as a good choice. Oddly, however, this very fact does make them a valid choice. I will explain the contradiction.

The last week saw some serious signs that Blu-Ray could win the high-def DVD war over HD-DVD. Many people have been waiting for somebody to win the war so that they don't end up buying a player and a video collection in the format that loses. (Strangely, the few players that supported both formats tended to cost much more than two individual players.)

I've written before about both the desire for universal dc power and more simply universal laptop power at meeting room desks.

Today I want to report we're getting a lot closer. A new generation of cheap "buck and boost" ICs which can handle more serious wattages with good efficiency has come to the market. This means cheap DC to DC conversion, both increasing and decreasing voltages. More and more equipment is now able to take a serious range of input voltages, and also to generate them. Being able to use any voltage is important for battery powered devices, since batteries start out with a high voltage (higher than the one they are rated for) and drop over their time to around 2/3s of that before they are viewed as depleted. (With some batteries, heavy depletion can really hurt their life. Some are more able to handle it.)

With a simple buck converter chip, at a cost of about 10-15% of the energy, you get a constant voltage out to matter what the battery is putting out. This means more reliable power and also the ability to use the full capacity of the battery, if you need it and it won't cause too much damage. These same chips are in universal laptop supplies. Most of these supplies use special magic tips which fit the device they are powering and also tell the supply what voltage and current it needs.

End of next week I'll be going to Munich/München for an interesting conference called DLD. Since the flight is so long and I haven't been to Bavaria since I was a kid, I booked a few extra days around the conference, even though it's not exactly the high season. I welcome comments from blog readers on stuff to do there, and in surrounding Bavaria -- we'll take some day trips to the Alps and maybe to Salzberg. I know there's a great science and tech museum we'll go to.

I want to enhance two other ideas I have talked about. The first was the early adoption of self-driving cars for parking. As I noted, long before we will accept these cars on the road we'll be willing to accept automatic parking technology in specially equipped parking lots that lets us get something that's effectively valet parking.

I also wrote about teleoperation of drive-by-wire cars for valet parking as a way to get this even earlier.

Valet parking has a lot of advantages. (I often joke, "I want to be a Valet. They get all the best parking spots" when I see a Valet Parking Only sign.) We've given up to 60% of our real estate to cars, a lot of that to parking. It's not just denser, though. It can make a lot of sense at transportation hubs like airports, where people are carrying things and want to drive right up close with their car and walk right in. This is particularly valuable in my concept of the minimalist airport, where you just drive your car up to the fence at the back of the airport and walk through a security gate at the fence right onto your plane, leaving a valet to move your car somewhere, since you can't keep it at the gate.

But valet parking breaks down if you have to move the cars very far, because the longer it takes to do this, the fewer cars you can handle per valet, and if the flow is imbalanced, you also have to get valets back quickly even if there isn't another car that needs to come back. Valet parking works best of all when you can predict the need for your car a few minutes in advance and signal it from your cell phone. (I stayed at a hotel once with nothing but valet parking. The rooms were far enough from the door, however, that if you called from your room phone, your car was often there when you got to the lobby.)

So I'm now imagining that as cars get more and more drive-by-wire features, that a standardized data connection be created (like a trailer hitch brake connection, but even more standard) so that it's possible to plug in a "valet unit." This means the cars would not have any extra costs, but the parking lots would be able to plug in units to assist in the automated moving of the cars.