Facebook's Zuckerberg to Give 99% of Stock Shares to Charity

This really is a nice story. There are billionaires who use their money to lobby congress so they can make billions more. There are billionaires who run for president because being a billionaire still isn't enough glory. There are billionaires who keep it all, or donate only to have something named after them, so that their names will live on forever.

And then, there are guys like Mark Zuckerberg, Bill Gates, and Warren Buffet who really truly want their overwhelming wealth to be used for society's betterment.

Not all billionaires are made alike.