It's there Office 2007 bits have been Released to Manufacturing (RTM). They are the first and Windows Vista will soon follow. This release is such a major change for the office product line and not only for the UI interface but also for the server products. For me Office 2007 rocks.
Check out the official press release: http://www.microsoft.com/presspass/press/2006/nov06/11-062007OfficeRTMPR.mspx