http://blogs.technet.com/technetplussubscriptions/archive/2009/04/15/exchange-server-2010-beta-now-available-on-technet-plus.aspxWe are pleased to announce the availability of the Exchange Server 2010 beta to our subscribers. The Exchange Server 2010 offers features that will help businesses share server data, and administrators and end users can now seamlessly go between internalen-USCommunityServer 2.1 SP1 (Build: 61025.2)