Facebook Hits 500 Million Active Users

Facebook has just announced that they now have 500 million active users, a substantial percentage of the world, and far more total users than the US has citizens. Using the most recent world population estimates, 7.4% of all people in the world, are active Facebook users.

http://thenextweb.com/socialmedia/2010/07/21/facebook-hits-500-million-active-users/