I'm also kind of lost on what problem this is trying to solve. Connecting bands to fans? Connecting bands to bands? Personally, I've seen a lot more musicians

I'm also kind of lost on what problem this is trying to solve. Connecting bands to fans? Connecting bands to bands? Personally, I've seen a lot more musicians switching from myspace to bandcamp than facebook or soundcloud (though I think soundcloud has gotten a lot more traction in more electronic scenes). Last time I tried was a few months back but the interface in facebook was simply terrible for posting music. I think that tightly combining social and music is not really so important. Bandcamp provides a beautiful and easy way to present, give away, and even sell your music. You get a professional URL to your work with only a tiny bandcamp footer which can be shared (organically and via like buttons, etc). In some ways, combining bandcamp and facebook/twitter is the unix philosophy in action.