Is it possible to have a proxied type that is non-public (internal)?

As part of the switch to 1.2 alpha, I thought it would be a good idea to embrace the new proxying defaults. However I'm not too keen on making all the domain objects in my commercial WinForms application public.

Given that the TypeLoadException is thrown from DynamicProxy, I'm thinking that I'm going to have to find a workaround of some description. My objects are already built against interfaces, but I can't proxy those since there’s too much functionality in my concrete implementations (eg, as per this article: http://www.codeproject.com/csharp/DelegateBusinessObjects.asp).

Any suggestions?

Nathan