Once you link your PlayStation Network account to your Facebook account, you will be able to turn on options to automatically update your Facebook profile in 3 different areas: trophy information, purchasing information, and game event information. You’ll have to manually sync your Trophy Collection to send the information to Facebook, but when you do your PS3 will update your Facebook profile with any of the new trophies you’ve earned since your last sync.
http://mashable.com/2009/11/17/facebook-ps3/
