If you haven't upgraded to ASP.NET MVC 2 RTM for Visual Studio 2008, you need to download ASP.NET MVC 2 RTM directly or through the Web Platform Installer.
If you are also using the Spark View Engine with ASP.NET MVC, you can also download the latest binaries of the Spark View Engine which have been compiled against ASP.NET MVC 2 RTM.
You can download Spark View Engine 1.1 for ASP.NET MVC 2 RTM here.
For screencasts and tutorials on the Spark View Engine with ASP.NET MVC 2, check out the official Spark View Engine website.
Hope this helps.
David Hayden
ASP.NET MVC 2 Tutorials and Related Posts