it has been officially confirmed from activision and will be coming out July 17 2007. It has 30 tracks to rock out to.
so far 6 songs have been confirmed which are
Wanna Rock - Twisted Sister
I Ran - Seagulls
Round and Round - Ratt
I Want Candy - Bow Wow Wow
Metal Health - Quiet Riot
Holy Diver - Dio
Heat Of The Moment - Asia