Here’s the real measure of the success of Guitar Hero – bands have started giving Harmonix the real tracks to make the game from (previously, Harmonix used soundalike cover bands). From, of all people, Wil Wheaton:

Well, it turns out that Les Claypool, bass player and lead singer for Primus, is a huge Guitar Hero fan. When he found out they were doing Guitar Hero 2, he gave the team permission to include Primus’ first single John the Fisherman in the game. He also gave them the master tracks as recorded for their album Fizzle Fry, so when you play John the Fisherman in Guitar Hero 2, you’ll be playing along with Les, Larry “Ler” Lamond, and Tim “Herb” Alexander, just like you were with them in the studio in 1989.

Coooool.