hey,
also thought I'd mention this since app world is rocking an ancient version of Facebook for Blackberry, in the beta zone fb v3.1.0.11 is out with all sorts of goodies like Groups support, Liking Comments and lot's of other stuff. been out for a while now thought this was released already lol.
again, if u want this app and the new twitter go to the blackberry/beta and sign up. once you download the app you'll get an email with a long a** code, copy and paste it into the welcome screen.
enjoy.