The Progressive Blog Alliance is running on CivicSpace (nee Drupal)? And hosted by SmartCampaigns?
I just browsed back to the first message and this has been going on for a month. Goes to show how little attention I've been paying last few weeks, I guess.
It's a pretty wild-west kind of experiment. Looks like it might actually thrive, and its organization gives me ideas for The Niggerati Network...though they built their community before building their community site. That's usually a good idea and frankly is one of the major holes in my skill set.