Blackberry has updated the Facebook app to version 3.3. Now you can find your BBM friends and chat with your BBM friends right from within the Facebook for BlackBerry smartphones app.
New Features of Blackberry Facebook app 
- The new look and feel with refreshed icons and navigation.
- You can now share your BlackBerry PIN with Facebook friends and discover which of your Facebook friends also have BBM.
- You can now easily un-friend someone directly from within Facebook for BlackBerry smartphones.
- New Image viewing features- Faster viewing of higher resolution photos, thumbnails ,full-screen photo viewing and save photos to your device/media card.
BlackBerry App World [ Download Link ]