Facebook Crosses 250 Million User Mark, Adds 100 Million New Users in 6 Months

Another 100 days, another 50 million users for Facebook. Just three months after crossing the 200 million user mark, and six months after crossing the 150 million user mark, Facebook announced today that a quarter-billion people are now actively using the site each month. If Facebook were a country, it would now easily be the fourth most populous in the world.