When this baby hits 88mph.. your gonna see some serious shit!
Im sure there will be a good selection of body materials since theres no graphics involved its just about tweaking the numbers which would be easy.
Edit: Here is a quick list of some that I think should be in..
Aluminium
Stainless Steel
Carbon Fibre
Canoe building materials.. err, I mean composites
Plastic
Wood
Probably some more I've forgotten..