Originally posted by Gooshin there is no such body
unless... you get a medium format camera with a digital back... but thats alot of money.
And it'd be pretty tough to find a Canon one.
The good news is that even the higher end Canon film cameras are pretty affordable these days, so you can get a pretty sweet body for cheap. As has been pointed out, if you want to use FD mount lenses stick with an FD mount camera because the adapter isn't very usable.
Side note on the EF/FD switchover: from what I gather Canon wanted to make a clean cut and create a new mount that would handle the future needs rather than keep trying to retrofit things onto the old one. Look at Nikon and the damn compatibility matrix you have to consult whenever putting a lens on a body (oh yeah, this bangs the mirror, oh yeah, this one won't autofocus, that one won't meter...)-- meanwhile, any EF (or E) lens built fits, meters, and autofocuses (except for the E ones which from what I recall are the tilt-shift lenses) on every EF body. 22 years and no incompatibilities. Yeah, it pissed off a LOT of users when they did it, but in the long run they ended up ahead...