For all you smart developers using ASP.NET MVC to build your web applications, you will notice that ASP.NET MVC 1.0 is not included with Visual Studio 2010 due to a timing issue as to when ASP.NET MVC 1.0 was released and when features were locked down for Visual Studio 2010 beta 1.
If you try to open an ASP.NET MVC Project using Visual Studio 2010 beta 1, you are greeted with some error. No worries as Haack mentions the work around to get an ASP.NET MVC 1.0 project to open on Visual Studio 2010 beta 1 and points to this blog post for the fix.
There are some gotchas with it, however, as mentioned in the post.
Hope this helps,
David Hayden
Related Links: Tampa ASP.NET MVC Developer Group