Facebook fan or MySpace manic?
Facebook
Founded: 2004Estimated users: 34 million
Addictiveness rating: 9
Originally developed by Harvard student Mark Zuckerberg and designed so that students on campus could stay in touch it has since become one of the most popular sites on the web. It is now available to anybody with a valid email address.
Look through our other great galleries!
Why not test yourself with our quizzes?
Looking for something different? Try our weird news!
Latest news headlines