Great paper on music communities.

Not sure how long this link will be active for, but there is a good paper on Online Music Collaboration Communities which I happened across whilst kind of browsing through Google. Seems to be up-to-date too, worth a read:

This paper will explore online music collaboration communities, and the social interactions that happen within them. Collaboration is the act of working jointly with others on a common project, and is inherently a social act. For collaboration to occur there must be some type of communication channel set up to handle the shared information.