In addition to Facebook Pages being able to update a Twitter account, Facebook now lets individuals (that means you!) do the same as well.
See the full article by Emil Protalinski here: Facebook now lets you update Twitter.
Go to <a href="http://www.facebook.com/twitter/">facebook.com/twitter</a> and click the green button titled "Link My Profile to Twitter."
You'll be redirected to Twitter temporarily. Click the blue button titled "Authorize app."
Choose which Facebook items you want to share and click the blue button "Save Changes."
You're done! Your public Facebook updates will now be posted to Twitter.