I have been using the Facebook features of my Windows Phone for a while now but mostly through the People Tile and NOT the Facebook app. Thankfully now there is a new and improved Facebook Application.
Download it and let me know what you think.
The marketplace link http://www.windowsphone.com/en-US/apps/82a23635-5bd9-df11-a844-00237de2db9e
Their facebook page : http://www.facebook.com/apps/application.php?id=135892916448833
Engadgets post on it : http://www.engadget.com/2012/02/14/facebook-app-windows-phone-update/