Rizzo stressed during his presentation at TechEd that users will have to start thinking 64-bit when they think of the next version of SharePoint.
The 2010 edition will require a 64-bit version of SQL Server 2005 or 2008. In addition, the server will run on the 64-bit version of Windows Server 2008.
Rizzo also announced that SharePoint Server 2010 will not support Internet Explorer 6.
As far as the 64-bit support, Rizzo said as gently as he could, “You have been warned.”