My Own Bike
My friend Anders posted this site, myownbike.dk, on his Facebook wall yesterday, and even though I'm not a fixie fan, there's no denying that this is a pretty damn cool site. Design your own bike, from chain to frame. Check out my purple monster.
The whole site is in German with no English option, but just use Google Chrome and hit translate. There's lots of information about what kind of bits they're using for the chassis and other bits and bobs, so you know what you're buying, and of course they are open to individual modifications and the like. Great stuff.