I am very excited about the gp2x. I will be purchasing one in about a week, when I do I plan on making many additions to compatibility lists of: NES, SNES, GB/GBC, and GBA. I will also use my limited knowledge of C/C++ to look for bugs.
Note: I have now received my gp2x!
If you have a very tedious task to do on the wiki, contact me and I might do it for you ;)
Testing games on emulators (especially the ones for NES, SNES, GB/GBC, GBA, and PSX.)
Moving compatibility lists to proper articles