Bill Gates is stepping down from his day-to-day duties at Microsoft to focus more on his charitable work:

http://www.microsoft.com/presspass/press/2006/jun06/06-15CorpNewsPR.mspx

Microsoft Announces Plans for July 2008 Transition for Bill Gates

Working full time at Microsoft through June 2008, Gates then will continue as chairman and advisor while increasing Foundation efforts; Ray Ozzie and Craig Mundie to assume expanded roles