While we're on the topic of music aggregators, it seems clear to me that more is always better when it comes to band writeups/background. I love the Rhapsody/iTunes/Napster/YahooMusic model of listening to music, but I almost always want more details on the bands. When I'm listening to a playlist and a song comes on that I like; I want to read more than a few sentences about them. But for anything other than the usual hit artists, that's rarely available. Which suggests a great business, waiting to be built:
Wikipedia meets Rhapsody
If anyone's motivated and equipped to flesh out a band's bio and other details, it's its fans (and band members). But unless I'm missing something, none of the major online music services allow this sort of user-contributed content (somebody please correct me if I'm wrong). We're stuck with whatever the service's own editors supply, or whatever one-size-fits-all metadata came with the files. It's rarely enough.
Part of the reason this isn't offered may be that these services tend to use proprietary client software running locally on your own PC, so the usual web/wiki conventions of open participation may be tricky to implement. But in the age of Ajax, I don't see why that has to be the case. (No doubt DRM has something to do with it. But then why not a web/client combo, that uses a web interface for content and only uses the client for DRM/steaming?)
A few services, such as MSN Music, which is web-based, allow user reviews, but no more than that. Why not let users write/edit the band bio, discography, tour dates, reviews, essays, influences, pictures, and everything else? It works for Wikipedia, after all; this would just be a fine-sliced version of that, focused only on music.
Part of the amazing success of MySpace is that it's built on user-created content, including a load of band sites that are controlled by the bands themselves. Indeed, MySpace may be the best one to roll out such a new offering, combining a full-featured music stream/download service that has the same 1m tracks of all the others, along with the peer-production indie music and band sites that has made MySpace such a phenomena already.
Whether in their hands or someone else's, this is an idea whose time has come. The users want more. And they're ready to help.