Microsoft is having their 2008 Launch Wave Event on February 28 in Los Angeles. This is where they will "launch" Visual Studio 2008, Windows Server 2008 and SQL Server 2008. Of these, Visual Studio 2008 went RTM in November of 2007, Windows Server 2008 will probably RTM by February 28, 2008, and SQL Server 2008 is supposed to RTM by Q3 of 2008.
In the meantime, Microsoft has a "Heros Happen here" site, where you can register for a Virtual Launch Event (VLE). You can also register for a real launch event, such as the one in Denver on March 20, 2008