The guys over on the MS Performance Team blog just posted some great information about Windows 2008.
- Upgrade Paths for 2003 -> 2008
- Resource Limits of 32-bit and 64-bit
- Key Memory Management registry limits
"It’s February 1, 2008. Only twenty-six more days until Windows Server 2008 is released to the world. With that in mind, we have twenty-six posts lined up between now and February 27 covering areas of Windows Server 2008 that contain both general information as well as specific posts that are relevant to what we support here on the Performance team. So without further ado, let’s dive right in, beginning with the upgrade paths available for Windows Server 2008 shown in the table below:"