
Each Facebook user has on average 130 friends and shares 70 bits of personal information -- including home movies and family photos -- every month. With 500 million users detailing their moods and passions online, Facebook is more than a social networking site. It's a global phenomenon that's shaping the way people communicate.
Facebook has half a billion users. That's huge for a planet of less than 7 billion people. In fact, if Facebook were a country, it would be the third most populous nation after China and India.
What grew as the pet project of Mark Zuckerberg, when he was a student at Harvard, has exploded -- gaining eight new users ever second for the past 15 months. Facebook has changed the way many people communicate -- letting its millions of users share personal thoughts and images with their network of friends.
Still, Facebook is so popular that public figures have taken notice. President Barack Obama is credited with using the power of Facebook during his 2008 campaign. Even Pope Benedict has a profile -- sharing updates in eight languages.