Tantric has released a new version of his GBA Emulator for Wii/Gamecube:
2.0.8 - October 7, 2009
* Revamped filebrowser and file I/O
* Fixed MBC2 saving/loading
* Fixed some GB-Z80 instructions
* DVD loading in GameCube should work now (untested and unsupported)
* Many, many other bug fixes