Microsoft recently announced the release of Silverlight 4 Tools for Visual Studio 2010 and the WCF RIA Services v1.0 and Themes.
Download the Silverlight 4 Tools installer which will install the Silverlight 4 Tools and WCF RIA Services v1.0 over an existing RC installation and will take care of uninstalling previous installation bits. Also check out the Silverlight 4 Training Kit to learn more about how to build business applications with Silverlight 4, Visual Studio 2010 and WCF RIA Services
You can also download the new Silverlight 4 Application Themes which include the Accent Color, Windows 7 and Cosmopolitan theme.
Watch this video announcing the official release of WCF RIA Services v1.0!
Read more on Scott’s Blog Silverlight 4 Tools for VS 2010 and WCF RIA Services Released