Twitter was clearly the communication tool of choice at Gnomedex. Folks were using it for just about everything. Arranging meet-ups; announcements; and snarky comments/praise for the speakers. I heard several people say they were blogging less and relying more on Twitter.
Just googled "twitter democratic national convention" and see that lots of people will be twittering the Dem’s convention this week. Find someone you trust/enjoy (Rocky Mountain News?) and follow them.