I just found this free ebook that microsoft made available for download.
For those that are interested in the latest updates and the changes in the Windows 2008 TCP/IP stack i think it is a good reading.
See the following link at the microsoft site http://www.microsoft.com/downloads/details.aspx?FamilyID=c76296fd-61c9-4079-a0bb-582bca4a846f&DisplayLang=en