Between all the other big features in Visual Studio 2010 you could easily forget that also the ReportViewer controls got improved a lot.
In server mode, the ReportViewer control can connect to and leverage the features of SQL Server 2008 R2 report servers, as well as still connect to previous Reporting Services server versions.
In local mode, the new Visual Studio 2010 ReportViewer supports the 2008 RDLC schema, which includes features such as tablix, richly formatted text, gauges, and enhanced charts, previously introduced with Reporting Services 2008.
The Report Viewer runtime works with .NET 3.5 as well as .NET 4.0. You can download the stand-alone runtime redistributable here.