SQL Server 2008 R2 is a big release, with new “editions” (MSDN contains the detailed feature by edition matrix), and includes also significant enhancements in Reporting Services. The stand-alone download package for Report Builder 3.0 is available as well.
More details about Reporting Services 2008 R2 and Report Builder 3.0 can be found here:
Reporting Services 2008 R2 Overview
Report Builder 3.0 Portal