http://technet.microsoft.com/en-us/library/cc263356.aspx
http://technet.microsoft.com/en-us/library/cc262287.aspx
More..
http://technet.microsoft.com/en-us/library/ff598584.aspx
http://technet.microsoft.com/en-us/library/cc789336.aspx
New Features in SP10
http://www.windowsitpro.com/article/hardware/new-features-in-sharepoint-2010.aspx