Carol Loomis reveals the VERY important project Buffett and Gates have undertaken (it's a long article, so I've pasted the full text at the end of this email):

Bill Gates, Melinda Gates, and Warren Buffett are asking the nation's billionaires to pledge to give at least half their net worth to charity, in their lifetimes or at death. If their campaign succeeds, it could change the face of philanthropy.

 

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June 16, 2010, 7:00 am

The $600 billion challenge

By Carol J. Loomis, senior editor-at-large

http://features.blogs.fortune.cnn.com/2010/06/16/gates-buffett-600-billion-dollar-philanthropy-challenge

FORTUNE -- Just over a year ago, in May 2009, word leaked to the press that the two richest men in America, Bill Gates and Warren Buffett, had organized and presided over a confidential dinner meeting of billionaires in New York City. David Rockefeller was said to have been a host, Mayor Michael Bloomberg and Oprah Winfrey to have been among those attending, and philanthropy to have been the main subject.

Pushed by the press to explain, Buffett and Gates declined. But that certainly didn't dim the media's interest in reaching for descriptions of the meeting: The Chronicle of Philanthropy called it "unprecedented"; both ABC News and the Houston Chronicle went for "clandestine"; a New York magazine parody gleefully imagined George Soros to have been starstruck in the presence of Oprah. One radio broadcaster painted a dark picture: "Ladies and gentlemen, there's mischief afoot and it does not bode well for the rest of us." No, no, rebutted the former CEO of the Bill & Melinda Gates Foundation, Patty Stonesifer, who had been at the meeting and had reluctantly emerged to combat the rumors. The event, she told the Seattle Times, was simply a group of friends and colleagues "discussing ideas" about philanthropy.