I love the idea for this feature and I can definitely tell you not only thought about fans, but also bands (only allowing listeners to play a song once). Unfortunately, this can easily be circumvented by hopping onto YouTube and listening there (unlimited and free). Better yet, what happens when YouTube adds this very feature to their platform?
So Pandora + recommendation algorithm? Sounds cool, but the rhetoric seems a bit overblown.
You can't share songs on Pandora. You can share a station with the same seeded artists, but not a specific track. Add to that the feedback email, the highlighting of your friends who have similar taste, plus a double-dose of rhetoric, and that's Earbits. ;)
This looks really similar to Voxound (www.voxound.com)
This seems like a cool service, but only until FaceBook Music comes out (which seems inevitable).
I love this idea. Most of my social connections are based on music tastes.