Microsoft published a guide about changes in functionality from Windows Server 2003 with SP1 to Windows Server 2008
Describes features and technologies in Windows Server 2008 added or changed since Windows Server 2003 with Service Pack 1 (SP1).Changes in Functionality from Windows Server 2003 with SP1 to Windows Server 2008
These topics apply to the next release of Windows Server 2008, based on the functionality expected to be included in the Beta releases in 2007. They do not describe all of the changes that are included in Windows Server 2008. Instead, they highlight changes that will potentially have the greatest impact on your use of Windows Server 2008 and provide references to additional information.
