I ran across this article where the creators of the game "Rock Band" are launching the brand new "Rock Band Network." Details are minimal at this point, but the program will allow for the user to create playable tracks & submit them for review. If approved, the songs will be available the "rock band store" for purchase. The creators will also be getting paid per purchase.
I think this is a great idea. It promotes creativity & gives a chance for unknown bands to get their music to a whole new audience & to get paid for it. It'll be very interesting to see how this will work once all the details are finally revealed. Ultimately, it could be a brand new way for new artists to be discovered or it could be a way for already established artists to debut new material.