Joshua Levy and PDF do a great service for the movement by digging into the advocacy uses and literature on Myspace organizing. This is a good read as a primer for thinking about social network sites and the ways they can be used in advocacy.
MySpace profile is not a replacement for a campaign's homepage. Instead, it is meant to be part of a participatory ecosystem that campaigns must set up. ... MySpace profiles are the equivalent to canvassing on the street or in a mall; they are part of a larger outreach effort...That said, it's becoming increasingly clear that a campaign without a social networking profile will be taken less seriously in the coming years.
After talking with Boothe and Goodstein, I realized there are four main rules about organizing on MySpace (and perhaps on Facebook and other sites as well). What follows is a breakdown of those rules with details from our discussion. Four Rules of Organizing on MySpace