It looks like the creator of Facebook is number six in the richest. I never really understood, or cared for, the Facebook phenomenon, but to say it is a success would be an understatement. It is kind of ironic to me as an IT management type that the founder of Facebook would eclipse Oracle's Larry Ellison because, well, you can actually get serious business done with Oracle's offerings. But, I digress. Forbes has details here: Mark Zuckerberg Gains $4 Billion To Become World's Sixth Richest Person Ahead of Larry Ellison
Good luck to him, what an accomplishment that is. You constantly see people saying Facebook is dying but they are innovating and capturing audiences just as quick as they are losing certain age groups. I cant see Facebook going anywhere soon.