This may be old news, but I just saw it.
It was confirmed by GameSpot that Guitar Hero II would be ported to "all significant consoles" in early spring 2007. Speculation is that enhanced Xbox 360 and PlayStation 3 versions will be released simultaneously with a separate Wii release.
On September 27, 2006, at Microsoft's X06 Event in Barcelona, Spain, developer RedOctane officially announced an Xbox 360 version of Guitar Hero II that will feature exclusive downloadable content, as well as an exclusive guitar controller, a replica of the Gibson Explorer.
I don't know if I was the last person to play this game, but I played it for the first time last weekend and had a BLAST. I was rocking the mo' fo! I thought it would be really hard, but it was easy enough (or I am a natural) and loads of fun. My wife thought I was a huge dork dancing around and stuff, but I was feeling the rock spirit. F Yeah!!!!!!