Last week, Slate's Tom Vanderbilt pointed out that "the leading deterrent to potential bicycle commuters is lack of a safe, secure parking spot on the other end." He argued for better bike parking in American cities. But you can solve the same problem with bike design. If your bike folds up like "The Contortionist," you can store it almost anywhere.[youtube]http://www.youtube.com/watch?v=l9_XEgGQBkQVia Treehugger.