Well, they've upped the ante quite a bit in that area. They got a three pack of Dead Kennedys and Mission of Burma for Wii a few weeks back, they put out Pearl Jam's entire Ten album a few months ago, and just generally have
enough snippets of various stuff to make the game enjoyable for about anyone. It makes it a lot of fun at family gatherings or parties, pretty much like an interactive karaoke machine.
Not to mention the upcoming Beatles Rock Band, which promises to eventually shamelessly whore out much of The Beatles entire catalog. So excited for that.