Well Boemien a GC emulator is pretty much impossible on the n900. It would be cool to port other possible system emus like turbographx or maybe update picodrive to the latest version to support more mega cd and 32x games. There are some cool emulators on other devices like cannoo, gp2x and pandora that still haven't been ported and those would be a lot more useful (not to mention actually playable) in my opinion.