Microsoft at the Windows Hardware Engineering Conference (WinHEC) announced that Windows Server 2008 R2 will be 64 bit only and also that Windows Server 2008 R2 will support 256 logical processors
Windows Server 2008 R2 also supports more than 64 processors, so customers can take advantage of advancements in hardware. Coupled with SQL Server 2008, this enables an optimum use of hardware to parallelize tasks and boost performance.
Now that is pretty nice, I wonder what the license would be for 256 Logical Processors? At least you can run that Intel 80 core CPU on windows now, Windows pre 2008 R2 'only' supported up to 64 Logical Processors.
Read the Q&A with Bill Laing here: http://www.microsoft.com/presspass/features/2008/nov08/11-06winserverr2.mspx