Well, it's not so much a LONG bike as a friggin' TALL bike:
Richie Trimble’s 14.5 ft. Tall Bike
I read about L.A.'s CicLAvia a few years back, and I've thought that it was a great idea to encourage cycling in the city as something more than a recreational hobby for men in lycra. Of course, this sort of event tends to bring out everyone (except maybe the road-racers) for a nice and easy ride through the streets.
...including a man on a 14.5 foot bike. :D