Well, this should make the patented Joystiq Instrument Compatibility Matrix a bit easier to memorize. Straight from our special Leipzig correspondent Jem Alexander, Activision says that If you play Guitar Hero World Tour on PS2, PS3 or 360, your instrument is going to work. Whether it be from Rock Band, Rock Band 2 or whatever, it works with Guitar Hero World Tour.
Now, what does this mean for the Wii version of the game? We have absolutely no idea. But hey, what are you complaining about: It's got Miis in it! Isn't that enough?