Facebook is turning into quite the page turner....look at what it is doing for promotion... 

After Perez Hilton recorded a single-day high of 13.9 million page views on the day after the Oscars, web research firm Hitwise found that the celeb gossip site’s top traffic source is Facebook. That’s crazy — for nearly as long as web analytics have been widely available, the top referrer for just about anything has been Google.

http://newteevee.com/2009/03/06/changing-nature-of-virality-facebook-and-twitter/