Many people who use Twitter and Facebook use the Twitter Facebook Application to update their facebook status. The facebook status is populated by every tweet except @ messages and direct messages. Even RT (retweets) show up as the facebook status.
I used to use this application. But I stopped. And if you do this, I think you should stop too. I’m going to tell you why. If updating your facebook status manually is too much bother, then I’ll offer an alternative facebook application.