Partybike!

OK, here's a bike (or bike-like thing?) I'd never seen until my trip to NY, where I saw one in action. Cruised on by somewhere near Times Square.

The 7-person Partybike looks like what you'd get if you crossbred 7 bikes with, um ... a tractor or something? Pretty rad, and seems like it'd be a ton of fun. One person steers, all seven people pedal. I wonder what the top speed is?