Arpan Shah Microsoft Project and SharePoint Blog
With SharePoint SP1, SharePoint 2007 supports Windows Server 2008. The MOSS & WSS evaluation guides have been updated with installation instructions for Windows Server 2008. We also published a Resource Center on TechNet with information for WS08 & SharePoint @ http://technet.microsoft.com/en-us/office/sharepointserver/bb735844.aspx.
Recently, we released a whitepaper that does a great job highlighting the benefits of WS08 w/ SharePoint @ http://go.microsoft.com/fwlink/?LinkId=116395&clcid=0x409. It's new and a great, quick read. Here's a table from the whitepaper that summarizes some of the benefits that can be achieved when you deploy SharePoint on Windows Server 2008:
Custom Event Log Views
Roles and Features
Reliability & Performance
New TCP/IP Stack
Reliability & Performance Manager