We've been hearing all about PlayBook OS 2.1 for quite some time now. We even heard a little rumor that it would be dropping tomorrow in the morning. Of course, usually before an OS update for the PlayBook, we get a little Bridge update as well, and apparently that's what we've gotten.
BlackBerry Bridge has been update to v188.8.131.52 and is now making its way to everyone's App World ahead of (hopefully) a new PlayBook update as well. If you haven't gotten the update yet, refresh App World and see.