Ok, the GP2X port is nearing release.
I'll put up a test version (with full sound and music) tomorrow. Currently I have two versions, a standard SDL build which needs a bit of overclocking (266 should be full speed) and a HW accelerated SDL build (using paeryn's) which runs at fullspeed with 200 MHz but has a few glitches (paeryn's is still in alpha stage, I'm afraid).
Oh, and in the meanwhile, one thing: My mixing function seriously needs optimizing. I don't know if this is still possible, I've replaced all divisions by bitshifts and some logical constructs by bitwise operation. But that said, I'm not very good at optimizing things. If someone would take a look at it, would be nice (contact me if you know how to optimize code).