Coolopolis has a post about the Ride it Forward experiment. A bike has been left in the city for people to do with as they please. The only thing asked in return is that people write about it for a blog.
Now, predictably, the bike has gone AWOL. Considering how rampant bike theft is here, can this really be a surprise? Bookcrossing works because used books have pretty little value. Bikes are different.