We haven't really seen too many updates for Facebook for the BlackBerry PlayBook since it launched earlier this year, but today version 2.1 is available with some nice improvements including Facebook Groups. Also included is improved media access allowing you to more easily view photos and videos from within the app.
Facebook Groups is designed to let you share and interact with the groups that you are interested in the most. With Facebook Groups on the BlackBerry PlayBook tablet, you can view groups that you're a member of, post updates, photos and videos, view profiles of group members and send messages, and get notified of new group posts and interactions so you never miss an update.
Facebook 2.1 is a free download and is available in BlackBerry App World.
Source: BlackBerry Blog