For those who REALLY want the Guitar Hero experience on their computer, MacMall has Guitar Hero III for $72.99. Website says in stock:
http://www.macmall.com/macmall/shop/detail.asp?dpno=7352689&Redir=1&description=Aspyr%20Media-Guitar%20Hero%20III:%20Legends%20of%20Rock%20with%20Guitar%20Controller%20-%20Mac%20&%20Windows-Educational%20Software
On another note, I don't see an OSX icon down there in the Post Icons......
http://www.macmall.com/macmall/shop/detail.asp?dpno=7352689&Redir=1&description=Aspyr%20Media-Guitar%20Hero%20III:%20Legends%20of%20Rock%20with%20Guitar%20Controller%20-%20Mac%20&%20Windows-Educational%20Software
On another note, I don't see an OSX icon down there in the Post Icons......