SQL Server 2008 R2 was released to manufacturing on April 21, 2010.  You can read more about it here.

RTM downloads already available: 

Cumulative Updates:

You can read about specific new Reporting Services features added in November CTP on top of what was available in August CTP.  You can research and ask questions on the dedicated MSDN forum

Last page update: March 4, 2011.