Blogging Documentary

I was thinking about doing a documentary on blogging on the way home from school today. There's an interesting story in there about free speech, political activism, and the marketplace of ideas. But there are other interesting aspects as well, for instance, why so much blogging is "warblogging," whether other services like Friendster could be considered blogging, and bloggers relationship with other media. It's an interesting story, I'm not sure how visual it would be, but I may start outlining some ideas.