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edit: Dec 16
Hey all, thanks for your comments! – see my response at the end of the post.
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A bicycle is loved for its mechanical elegance and simplicity. It’s a bummer when you have to muck that by carrying all this extra stuff.
Here is a common problem, and a common urban solution. There’s got to be a better solution than a big hunk of metal in your pocket.
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edit: Dec 16
Hey all, thanks for your comments! that’s some great feedback, and I appreciate your understanding that this is just a developing sketch. I have thought of a lot of the issues that you bring up and I agree with you. I’m excited to develop the idea further. Keep posting comments, and if anyone has a design firm wanting to pursue the idea, send me an email.
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edit: Dec 19
Nice, thanks for the post Anonymous – check out this 2004 Cannondale
http://gb.cannondale.com/bikes/04/ce/model-4SS2.html 
I love the idea of using the fork instead of the handlebars. One thing about the handlebars is that it would be easy to torque them apart with a crowbar. Critique: This Cannondale implementation doesn’t lock the frame to anything, and it only addresses one wheel. Can we take the idea further?
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I really like your seatpost to bike-lock idea…I think it’s fantastic! An elegant, simple solution. You should really pursue it, see what happens.
“There’s got to be a better solution than a big hunk of metal in your pocket.”
…like making your whole bike a rolling u-lock? Yeah, nice try, but in reality you’re adding a fuckton of weight to the entire bike that cannot be shed.
I’d pass in reality.
The anonymous assertion about weight is really an issue of purpose.
If you already having to drag around the extra weight of bike locks in a bag or awkwardly hang them from the frame or handlebars, the weight is already present.
Incorporating what are basically mandatory devices for urban biking into the bike itself is an excellent idea. Sure, the cyclists that want the lightest, fastest bikes so they can go road trekking for 4-hours will want something else. But when the main purpose of the bike are on average 2-mile or 20-minute task oriented trips (errands, commute, social outing) the convenience of integrated features is more important than weight.
Again, if you already have to carry the weight, EC is wise in investigating less awkward ways to carry that weight.
Great great great line of thinking and damn fine mockups. The main issue for me would be that I really want to be able to add this to my existing bike, which put together from a bunch of parts form different vendors. There is no way I would want to buy a fram, wheelset etc from a verndor just based on their ability to make a proper lock. So I guess I’m saying that I want just a seatpost that adapts to most handlebars. This is similar to a solution like this: http://www.jstevenwood.com/images/bikelock.jpg
seatpost lock by Cannondale on 2004
http://gb.cannondale.com/bikes/04/ce/model-4SS2.html
Giant made a bike a few years back that used the handlebars as a lock. It looked simple and effective. I’ve only seen them in Holland, however.
Mark