Concerning Bud's question/comment
Is the authentication "via the API though? I checked it out but couldn't figure it out."
Yes, the authentication is done via the facebook API. The login procedure is here very good described.
Clicking on the 
button executes the following code:
<a href="http://api.facebook.com/login.php?api_key=YOUR_API_KEY&next=
YOUR_PATH_RELATIVE_TO_CALLBACK_URL"><img src="http://static.ak.
facebook.com/images/devsite/facebook_login.gif"></a>
We - Andre ;) - will demonstrate this on Wednesday in the Weekly Progress Presentation.
-Joern