If you're wanting to partake in some beta testing over the weekend, the BlackBerry Beta Zone has just loaded up a new Facebook for BlackBerry OS devices. Pushing into v4.1.0.18, this release doesn't bring any feature additions over previous releases though, it does squash some bugs along the way and includes some UI improvements to the 'Check-In' functionality. It's live in the Beta Zone right now.

Visit the BlackBerry Beta Zone