MySpace may be the king but it's not the only network to promote or even sell your music. The article Rock On: 12 of the Best Music Social Networks does a nice job summarizing their picks for the top music nets, including a few we've already covered here.

The web service offer a variety of interesting options, including selling your music, distribution to mobile phones, music learning, discovery, and recommendations, P2P distribution, personal radio stations, music playlists and sharing, widgets for your own web site, real-time music collaboration and jams, and artist investment.

Sites covered: Flotones, Mercora Radio 2.0, MOG, Last.fm, iLike, JamNow, MusoCity, Haystack, Sonific, Midomim iJigg, and Sellaband.