We guess Forbes went back to measuring rich folks. It was announced today, courtesy of Forbes' annual billionaires list, that Bill Gates is no longer the richest man in the world. The title now belongs to U.S. financier Warren Buffett, who had a very good year in 2007. He saw his wealth jump from an estimated $52 billion to $62 billion. A $10 billion year in the midst of a recession--wow. Interestingly, Buffett saw......