Nice review, and props for the inclusion of the South Park episode (which was friggin' hilarious).
Guitar Hero and Rock Band aren't my type of games, but I know they are both very popular right now and many systems have sold just because people wanted to play those games. A friend is just now IM'ing me about the fact that he'll be picking up Rock Band in the a.m. He's all set for a nice Turkey Day holiday playing that game with his family and his relatives back home. They'll have a blast with it over the holiday.