YAGCD

YAGCD is Yet Another GameCube Documentation. It is a comprehensive document on everything that is known about the GameCube; hardware, file formats, etc. Hardware as well as file formats have already been shown to have a large match between GC and Wii, so it might be a wise idea to check out the YAGCD when reverse engineering the Wii.

YAGCD is available here: http://hitmen.c02.at/files/yagcd/index.html