Daily Kos, the lively left-leaning political news and commentary site, is leaving Movable Type and switching to Scoop, which is the sort of community-building software I wrote about in the final section of my Habermas paper.
It's been suggested that blogs shouldn't have comments but that they should instead link to each other to make conversations more visible. The dKos move represents the radical counter to that view.
In the end, users will decide what they like best; in the interim there's plenty of room for both approaches, plus some arbitrage.