I've been developing the authentication system, and I have to say, I'm thoroughly impressed with ActionHero. It's an advanced piece of software that keeps surprising me; just when you think you have it figured out, a new problem surfaces, and AH reacts gracefully by giving you yet another option in the form of a solution.
The authentication system is simple: if an action is a login request, generate a new session for the user and store it in cache. Otherwise, search for the user's session in the cache. In both cases, Action Middleware is used to perform the authenticator's pass through behaviour. And in all cases, now that this system is working, all other actions are alleviated from the necessity of verifying users when triggered.
It's also lightning-fast; in most cases I've seen cache-auth activity as performant as 3ms, which is great!
Next I'll be developing character selection and creation.