This was on my list to post earlier last week, but I got sidetracked by work (again).
From the Microsoft UK:
Learn more about the next generation networking features coming in Windows Vista and Windows Server code named “Longhorn”. Dubbed the “Next Generation TCP/IP” stack, these new Windows networking investments and innovations represents the most significant update since the 1990s. Receive guidance on how to prepare for the enhanced performance, scalability and manageability capabilities coming in the next releases of Windows.Please note that the link above is to a video file.