http://blogs.technet.com/tonyso/archive/2008/03/20/most-popular-windows-server-2008-downloads.aspxTop 2 - FREE eval versions. Big surprise? Not so much...show me an IT Pro that doesn't like free eval version of enterprise software, and I'll show you...something...not very muchly seen around...much. Except maybe for the really laz...er...time-challengeden-USCommunityServer 2.1 SP1 (Build: 61025.2)