At the meeting, Buffett signed letters pledging the initial gifts and took questions from Bill and Melinda Gates and an invitation-only audience that included members of other philanthropic organizations.
"The first three letters were easy to sign; I just signed 'Dad'," joked Buffett, while signing a letter pledging funds to his daughter Susan A. Buffett's foundation. "I'm not sure a billion has ever been sent with a letter that says 'Dear Suze.' I wanted to make sure I never wrote one that started 'Dear Anna Nicole Smith'," he quipped.
Warren Buffett on giving away 85% of his fortune.