Here’s how to update your Twitter Status directly from your Facebook Fan Page status updates. Bad news, there is no way to easily update Twitter from Facebook user accounts. Grrrr Facebook, sometimes you make Grandma angry. To link your Facebook Fan Page with your Twitter account, just go to www.Facebook.com/twitter to get started. Watch the tutorial for more information about updating your Facebook User account and Twitter at the same time.
Also take a look at my post on How to Link Facebook and Twitter – lots of good tips there.