Palo Alto, Calif. -- Facebook, which recently passed rival MySpace as the most-visited social network in the U.S., said that it now counts more than 250 million users, having added 50 million since early April. "The rapid pace of our growth is humbling and exciting for us," wrote CEO Mark Zuckerberg in a blog post. Palo Alto-based Facebook counted 70.28 million unique visitors in May, besting News Corp.'s MySpace (70.26 million) for the first time ever.
http://blog.facebook.com/blog.php?post=106860717130