Microsoft today released an update to the Facebook beta app in Windows Phone Store. This v8.3.0.1 brings in new UI and lots of new features. Joe Belfiore last week promised that much improved Facebook app is coming soon and I guess this is the start to it.
v5.3 Additions:
•Updated design
•Improved performance
•Video upload
•Support for additional languages
Download the app here from Windows Phone Store.