clipped from: www.insidefacebook.com   
It’s been just under 90 days since Facebook announced it has crossed the 200 million active user mark. Today, that number is somewhere around 240 million, perhaps even close to 250 million. If Facebook were a country, it would now have the 4th largest population in the world.

its growth rate seems to have again significantly increased in recent weeks to around 700,000 to 750,000 new users per day

about 70% of that growth is happening outside the United States