ArtistData sounds like a great marketing tool:

"ArtistData is a free service that allows artists and managers the ability to post information only once and have it updated across many online destinations simultaneously, including Eventful, Jambase, MySpace, Pollstar, PureVolume, ShowClix, VIRB and recently added Last.fm, Mojam and Musi-cal. ArtistData’s synchronization network continues to expand and will soon include AmieStreet, Buzznet, Beta Records, Famecast, indie911 and Hoooka."

FanDoodle offers what HypeBot describes as a "straight forward and artist friendly" service that "enables fans to distribute downloads for artists and labels and get paid for it….Once music has been uploaded, fans place banner code or text links in their emails, websites, MySpace or Facebook pages, blogs, or forums."

In case you’re just getting into this social network marketing thing, check out Wired’s How-To Wiki:
Promote Your Band on MySpace

Wired Wiki via KnowTheMusicBiz.com.