Unfortunately and brilliant as they are, forums as yafnet and mvcforum are neither scalable nor decoupled enough to help me with my problem:
a) I want a forum that allows me to use different security systems, whether membership provider, simple provider, or (As is now) ASP .NET Identity with claims.
b) I have not found a free-source forum that allows me to do anything; wrapping a membership provider around ASP .NET Identity, would not work due to how OWIN works, disabling form/cookie authentication.
c) In light of such a dead end, I would like it if someone directs me to a product they have used that they know allows for strong customization in the register/login module, regardless of cost.
Thanks once more.