It would be great if there were an area of the forum dedicated to hardware mods on the GP32. I plan on tackling one or two things myself (power LED replacement, RGB output, etc), and I'd love to post the progress.
I heard someone talking about DOS on a GP32 a little while back, and it really made me think. Would it be possible to get DOS running on a GP32? Failing that, perhaps a program that could run Basic programs (snake or gorillas on GP32... oh yes :))?