http://www.netfx3.com/blogs/news_and_announcements/archive/2006/11/06/.NET-Framework-3.0-has-been-released_2100_.aspx
It's a little confusing....the framework itself is done, but the Visual Studio 2005 Extensions for WCF and WPF are only CTP level (thus not 'supported' by Microsoft)....the Workflow Foundation Extensions are official.