The main thing that Amazon does not include is a way for fans to reach out to the band. Both MySpace and Last.fm offer a "wall" that fans can write on to express their affection for artists. Amazon isn't in the social networking business and is much more of a one-way information resource. Because of the lack of interaction, many fans will still flock to other music resources like MySpace music -- but I suspect that fans who just want to buy music will find everything they need on Amazon's new artist pages, which are vaguely Facebookesque in their presentation.