Today, Automattic announced that they have acquired the centralized commenting service IntenseDebate. Over the course of this year, 3rd party commenting systems have gained quite a bit of momentum for various reasons including having one place where to find all your discussions. With this move now, the centralized system gains even more momentum with virtually all new WordPress installations, hosted or self-installed, getting support for IntenseDebate out of the box according to Matt Mullenweg.