I've received some comments as well as have been contacted by a couple of customers about an issue they have been seeing when using the MVC RC in a Windows Azure Cloud Service project in Visual Studio.
The problem is that Visual Studio crashes with a CLR fail fast when doing an operation such as opening or creating a new view using the MVC tools.
We gave a repro to the CLR team and they indicated that the crash is due to a known issue in the CLR that affects more than just this scenario.
A patch (from the CLR team) is in the works and I'll post when it becomes available.
Sorry for the inconvenience.