Pandora and Last.fm Together…sort of
Quite frankly, the two services each do different things very well, although there is some overlap. Pandora is great for discovering new music based on what you like. Last.fm is also good at music discovery, but you can’t stream music directly from their site.
Where last.fm really shines, though, is in tagging and discussing music with friends. Because of the social aspects of Last.fm, a lot of people like storing and tagging their favorite music there.
It’s rough, but it works. And it shows the power of users in the new web to manipulate services to do things that the owners may never have contemplated.