Robert Bruckner announced that SQL Server 2008 R2 was released to manufacturing today. Robert summarized the most important most features. I covered them in my blog as well. I'll update this blog once I find out when R2 will be available on MSDN.
According to this Microsoft blog, R2 will be available for MSDN subscribers on May 3rd.
Wed, Apr 21 2010 11:45 AM