Hope you saw the announcement on the SBS Blog - http://blogs.technet.com/b/sbs/archive/2011/04/05/sbs-2011-essentials-evaluation-now-available-start-downloading-today.aspx

SBS Essentials Evaluation Download:

http://technet.microsoft.com/en-us/evalcenter/gg604826.aspx

 

SBS Essentials and Home Server 2011 MSDN/TechNet Download:

https://msdn.microsoft.com/en-us/subscriptions/securedownloads/default.aspx

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