Microsoft has released the official beta for ASP.NET MVC. You can download the Beta version from here. The Beta installer installs the ASP.NET MVC assemblies (System.Web.Mvc.dll, System.Web.Routing.dll, and System.Web.Abstractions.dll) into the GAC. In previous previews, these were not installed into the GAC. Because of this change, the default project templates do not automatically copy the assembly into the Bin directory of your application.
If you haven't looked at ASP.NET MVC before, this is the time to start to learn ASP.NET MVC. Below are some of my previous articles.