I just found this great post by Berkman Center fellow Gene Koo. He's talking about how Facebook has not yet become a site for meaningful grassroots citizen engagement. One of his insights is that current Facebook groups (like I Went To Private School...Now Pump My Gas!) are more like status-proclaiming tatoos than civic organizations. There's a lot of other good stuff in the post too. Here 'tis:

Networking is the lifeblood of all politics. So why are the Obama and other political applications for Facebook so terribly disappointing? At best, they function like bumper stickers for profile pages,