CNN:It was a busy week for Facebook, which hit a major milestone, made fashion news and made some users uneasy about privacy again. As of October 4, one of every seven people on the planet are actively using Facebook each month. "Helping a billion people connect is amazing, humbling and by far the thing I am most proud of in my life," Zuckerberg told CNN Money.
http://www.cnn.com/2012/10/05/tech/social-media/five-things-facebook/index.html