The Wii version of the game has several exclusive features, since a Wii Remote must be inserted into the guitar controller. The game utilizes the Wii Remote's wireless capabilities and accelerometer, as well as making use of the rumble feature and the internal speaker:[26] The internal speaker on the Wii Remote is used to emit an effect when incorrect notes are hit; and the Wii Remote's rumble feature is utilized when Star Power mode is activated. While the Wii version has online play utilizing game-specific friend codes, downloadable content was not available at launch, although it expected to be available in 2008.[27] The Wii and PS2 versions also use slightly different graphics and sounds from those on the Xbox 360 and PlayStation 3 versions, such as a different typeset, loading screen, and the Wii version featuring "miss" sounds more akin to Guitar Hero I and II.

SO basically put, if your friends have wiis you can play together, other then that there's no online capability. Also there is a Dolby sound issue that they are working on and when it's fixed they will provide people the oppurtunity to replace there disk with the correct one. I'd get it for the 360 so you can rock out with a bunch of us. Such as Drew, Black2kGSR, myself and various others that i believe are going to end up getting them free through www.yourfree360games.com