Hi
There is a lot of pages about Windows Server 2008 R2.
He we are a little ppt about that WS2008R2.
http://www.slideshare.net/aschek/windows-server-2008-r2-overview-presentation
And another interesting link
http://4sysops.com/archives/windows-server-2008-r2-new-features-the-complete-list-part-4-administration/
sanTos