Super Mario Galaxy looks awesome--it's really showing off what the Wii can do when the developers try and pull all its power out. Sure, it will never live up to the power of the PS3 or the 360, but if all games are gonna look as good as Galaxy, I don't think that will be a problem.
Cassidy... are you playing on the Gamecube or the Wii? If you're playing Twilight Princess on the Wii, then try aiming at the birds manually and using Z targeting for the Gale Boomerang.