IGN Cube has a "first look" at WarioWare for the Gamecube. Its not just a straight port, as Nintendo has opted add a multiplayer mode, which should only serve to make the game even more insane. Sounds to me like Nintendo may have made yet another classic four-player party game.
Bulldog, at least 95% of them should work (there may be slight misnaming). If there's some that don't work, my advice is to not use the File Editor, but to just re-name the pics to what the File Editor has them as.