The GP2X SDL library was a fan-released add-on. It could very well have problems, although noone else seems to be having trouble getting SDL apps ported... There was a page of tips somewhere for porting SDL apps to GP2X, but I can't remember where.....

EDIT: Found it, got the port up and running. Now to figure out how to redefine the controls....

*wow*

Looks like the 2X uses a completely different method of input, I'll have to re-write all the input stuffs....