I bought some wheels at Pick A Part for $80. I also ordered a MIG-100 welder kit on eBay for $140 which comes with a welding mask and wire and stuff. The welder and the angle grinder probably won't arrive for two or three weeks from now, however, so I'm gonna have to find something productive to do for the project in the meantime.

There's a picture of the wheels at http://www.craterfish.org/teamprodigies?pictures?2006/Aug - check out the nice rims!