In the Community OpenID xslt functions there is a call for cod:IsAuthenticated() to check credential.
It is possible to extend the functionality in MVC to check for OpenID.
I see there is a "Composite.Community.OpenID" name space i can try to include in the class.
However it seems to be an empty name space.
I would like to get user info like AccountID.
Ultimately i would like to create a webservice to host wp7 phone app but would like to test with MVC first.