Microsoft’s ASP.NET MVC 1.0 is now in Release Candidate (RC). It was release last on Tuesday, Feb 3 and there’s already been a refresh to the release candidate because there was a last minute bug discovered, fixed, and QAed. So if you don’t loaded it on Tuesday, you should download the “refresh.”
Full details of all the changes can be found in the release notes along with instructions on how to upgrade existing applications built with the ASP.NET MVC Beta to the RC.
ASP.NET MVC is built on ASP.NET 3.5, so to develop your solutions, you need Visual Studio 2008 or Visual Web Developer 2008 with SP1.