It's always nice to see Guardian Online alumni doing well, and our former syndicated columnist, programmer Bill Gates, reappears today in an exclusive interview talking about how he is giving his money away. Bill wrote (in Basic) the famous Donkey game that shipped with Microsoft MS-DOS v1 in 1981, though probably not many people are still playing it. Another former Online columnist and venture capitalist, Esther Dyson, featured in Saturday's paper.