Hey, if any digital painters out there fancy emailing a .psd file back and forth, just for fun, let me know. I think it would be a really interesting way to see how other people work. And it would be fascinating to see what we came up with.
I'm easy as to subject matter (although tanks, robots, spaceships, and attractive young women always get my vote), just keep it reasonably low-res (say 1280 x 768?) to keep the emailing easy.
If more than one person's interested, we could even send it round in a big loop, like a kind of photoshop pass-the-parcel.