Facebook just celebrated its 6th birthday, and Mashable just picked up an outstanding Infographic about the Facebook growth the last 6 years.

Facebook was launched on February 4, 2004 and has come a long way from a Harvard-only networking site in the intervening years. In fact, Facebook has undoubtedly become the world’s largest social network, with over 400 million users worldwide and more than 900 employees. Let’s take a closer look at what kinds of numbers and user activity this growth translates to.

http://mashable.com/2010/02/10/facebook-growth-infographic/

Click on the picture for high res version.