With the recent update to the ASP.NET MVC Framework, you may have applications that you've built with the first CTP that you'd like to upgrade to the new CTP2. Microsoft has posted instructions on how to upgrade your project.
I followed the instuctions, but I was noticing that when I tried to add new items to my project such as a new View Content Page, etc. the Add New Item dialog wasn't listing the MVC project items. One of the changes in the new CTP has put the MVC project items into their own grouping in the dialog, which is very handy. However, they weren't showing up in the upgraded project. They should be under Web | MVC.
In order to see the MVC project items you have to update the <ProjectTypeGuids> element in your .csproj file. The new values should be:
<ProjectTypeGuids>
{603c0e0b-db56-11dc-be95-000d561079b0};
{349c5851-65df-11da-9384-00065b846f21};
{fae04ec0-301f-11d3-bf4b-00c04f79efbc}
</ProjectTypeGuids>
Note that I've written it here on several lines for readability, but in your .csproj file it must be all on one line like this:
<ProjectTypeGuids>{603c0e0b-db56-11dc-be95-000d561079b0};{349c5851-65df-11da-9384-00065b846f21};{fae04ec0-301f-11d3-bf4b-00c04f79efbc}</ProjectTypeGuids>
That lets the designer know to give you the correct items types in your Add New Item dialog. Thanks to Andrew for the help in getting this working.