Lots of possibilities

You know that uber-popular plastic-instrument-wielding music game thats available for the PS3, the Xbox, PC, and who knows what else and it's not Guitar Hero??...yeah, Rock Band, that one...

well, for any musicians who are interested, the people who make the game will release a computer program that will allow you to code your recorded songs into a format that can be played in this game and downloaded by gamers and you even get paid for it (if people download it that is)

all the details are in this link (there's a lot of info, so im not posting the whole article here):
http://kotaku.com/5346803/power-to-the-people-how-rock-band-network-expands-the-game-gets-any-song-online

if this is done well, it could be HUGE (from a user generated content standpoint)