i'm a fan of these...

the first ones were implemented in lyon, france as a test for the whole idea...when i was over there this summer i saw them in barcelona, paris, and lyon. they have racks like this one ^^^ all over the city, you just swipe your card at one rack, the bike unlocks, then you ride to wherever you are going and put it into a rack around there. a lot of people actually ride them, but they aren't in the greatest condition because they don't have enough people or money for the needed maintanence.