Facebook's Mark Zuckerberg Climbs Forbes 400 Richest List

| by Mark Berman Opposing Views

Forbes magazine is out with its annual list of the 400 richest Americans, and while the names at the top are the same, there is one 26-year-old crawling his way there -- one Friend at a time.

For the 17th year in a row, Bill Gates sits atop the list with a net worth of $54 billion, up $4 billion from last year. He would be worth plenty more, but Gates is busy giving away his fortune to charity. So far he has given $28 billion to his foundation. (Wonder if he knows the Opposing Views School for Orphans with Malaria is now accepting donations?)

Gates' pal Warren Buffett is number two, at $45 billion. Buffett is another charitable man, urging his fellow billionaires to pledge at least half of their fortunes to charity.

The rest of the top ten has the usual suspects -- the family of the late Sam Walton, who founded Wal-Mart, Oracle's Larry Ellison, New York City Mayor Mike Bloomberg, but the man who sits at number 35 is the most surprising -- Mark Zuckerberg.

The Facebook founder, who is the subject of a critically acclaimed film currently in theaters, tripled his net worth to $6.9 billion, after the wildly popular Web site was valued at $23 billion. And that's considered a conservative estimate. That vaulted Zuckerberg past such stalwarts as Apple's Steve Jobs and News Corp's Rupert Murdoch.

Facebook's two little known co-founders, Eduardo Saverin and Dustin Moskovitz, make their first appearances on the list. Moskovitz is now the youngest billionaire in the world -- eight days younger than Zuckerberg. He's worth $1.4 billion, placing him 290th on the list.

Check out the complete list here.