I have to say, it's pretty sweet. My younger brother built this with my Dad using a beach cruiser frame and some ridiculously powerful motor.
If you're an Instructables member, you can vote for it in the Craftsman contest until January 11 (which I know he would really appreciate). Actually, I think you can vote for as many entries as you want, but, you know, his is the best.
Also, be sure to watch the video-- that was my contribution