and while on the subject of Halo 3, this is the free download for Guitar Hero III -the Haloz 3 Mjolnir Mix, performed by I think Steve Vai. This is so beyond awesome, it is pure evil genius, this will get move swaths of undecided fanboys (Rock Band or GH3) into the Guitar Hero camp. Can't wait to totally pwn on this song -all of a sudden all the other tracks look meh -this is the one to master dudes.