The usual post from Scott GU is at: http://weblogs.asp.net/scottgu/archive/2009/01/27/asp-net-mvc-1-0-release-candidate-now-available.aspx
I have had some issues though – it seems that Visual Studio wants to keep hold of a reference to the old DLLs. Even after uninstalling the old, reinstalling the new and using direct file references, I still had some issues with Visual Studio just crashing witrhout any warning and leaving some cryptic error in the event log.
It seems to happen when opening .aspx files so I would certainly recommend closing all of the files in the solution before upgrading – otherwise one gets stuck never being able to open the solution. Deleting all of the compiled bin and obj folders seemed to help a little and I think clearing the resharper cache was useful too.
The problem seems to have just gone away for the moment so I haven’t really got to the bottom of it. I think it is more a problem with VS than MVC.
There look to be some small updates that look nice according to Scott. I certainly have some base classes and extension methods that do a couple of them already. The best looking update at the moment is, in my opinion, the ability to have a view without a code-behind even when having a strongly typed viewmodel – looking forward to using that one!