I just finished building my cartbike, which too about a week, and while we were working on it, I was scouring the interenets for ways to improve it and make it easier to ride, and I came accross this feller.
I found the picture on this site, which has 28 pages of different silly bikes with short descriptions. Pretty cool.
Posting my own bike reminded me to post this. My friend, Brian, got a mtb for free, so he decided to make it into something he would actually ride. The painting process took the better part of 3 days and by the end I was tired of looking at the stupid thing that I didn't even care, but it came out really nice. It was also SS modded.
Schwinn LeTour III frame with original stem, bars, cranks, and front wheel (for now). Brakes removed and replaced with a cute little safety brake. Seat from another bike, and the rear wheel is Swift Arriv fixed/free.