Facebook and AOL have linked their instant messaging platforms. After downloading the beta software, AIM users can click a "Facebook Connect" button to set up Facebook chat. They'll then have access to their Facebook friends on their buddy list.
It's a quick right jab back at Google, whose announcement of Buzz yesterday heralded a clear intent to encroach on Facebook's social networking playground. Adding AIM users gives Facebook instant traction in the instant messaging space that they haven't been able to find yet on their own.