I know I've mentioned this phenomenon before, and encountered some dubiousness that such a thing be possible. Moving by bicycle: it can be done, especially if you have folks like the Chicago Critical Mass crowd to call on. Last weekend Rachel Friend pulled off a six-mile, single-trip move with the help of a couple dozen bike trailers, which was ambitious enough that it made the evening news (alternate link for the video).
Related news, in New York Earth Day can be celebrated by having your bicycle blessed. And if you're bicycle commuting in Manhattan, I'm sure you'll take all the help you can get.