In this Sept. 11, 2012 photo, Facebook CEO Mark Zuckerberg speaks during a "fireside chat" at a conference organized by technology blog TechCrunch in San Francisco. Zuckerberg updated his Facebook status on Thursday, Oct. 4, 2012, to announce that the social networking site has more than 1 billion active users each month. He thanked users and said that he is committed to making Facebook better. The Menlo Park, Calif.-based company has had a difficult time of late. There were trading glitches the day it went public in May and concerns since then about its revenue potential. It's also facing lawsuits from disgruntled shareholders.(AP Photo/Eric Risberg)
ONE BILLION: More than a billion people now log into Facebook each month, up from 500 million in July 2010. In August 2008, the social network had logged 100 million users.
MOST FROM ABROAD: Most Facebook users — 81 percent — live outside of the U.S. and Canada. Many of them log on from mobile devices rather than personal computers. The company now has 600 million mobile users.
ODD VIDEO: Facebook also released a video that, somewhat abstractedly, seeks to illustrate its ubiquity and utility in connecting people. It starts off with an empty red chair suspended over a forest and later proclaims that "chairs are like Facebook."