Here are links to the IT professional content published by the Windows Server UA Networking team in the Windows Server 2008 TechCenter:
Here are two white papers on Windows 7 and Windows Server 2008 R2 networking enhancements:
Future blog posts will spotlight technologies and solutions new to Windows 7 and Windows Server 2008 R2, such as DirectAccess and BranchCache.
Click, download, read, rinse, and repeat. :>
Joe DaviesPrincipal Technical WriterThe Windows Networking Documentation Team