Speaking of P2PJ, Henry Jenkins has written an article: Online diarists rule an Internet strewn with failed dot-coms (blogdex).
Ultimately, our media future could depend on the kind of uneasy truce that gets brokered between commercial media and these grass-roots intermediaries. Imagine a world where there are two kinds of media power: one comes through media concentration, where any message gains authority simply by being broadcast on network television; the other comes through grass-roots intermediaries, where a message gains visibility only if it is deemed relevant to a loose network of diverse publics. Broadcasting will place issues on the national agenda and define core values; bloggers will reframe those issues for different publics and ensure that everyone has a chance to be heard.