This site is a (fairly) in depth description of a (fairly) concrete implementation designed to be as simple as possible, but extensible. To that end, it's designed to be operated manually with no electronics necessary, but in a way open to scale and automation.
It is heavily biased towards using bicycle parts. Adapting to mass produced components may not be as much of an advantage as it would have been 5 years ago. The design presented can be regarded as primarily for description, and a physical prototype might end up looking not like it much at all.
March 3, 2010: I'm still building the site out, but I hope there's enough here to get you interested. There's open questions in the documentation pages, which (I think) anyone can comment on. If you have thoughts or suggestions (e.g. you know how I could get a particular coupling made, or you found a typo), please get in touch via the google groups link in the side bar, or to me directly at kitebot2000 /at/ gmail.
December 12, 2011: First real update since initial site build. See Still, Still here.