Yes, this is certainly possible with the current codebase.
You would need to front it with a load balancer, for the initial HTTP request, but from then on it could be done using the technologies present in the ESB. There are also some additional changes which can short circuit some of the work, helping to speed up the app.
I will be covering some of this during a BoF at next week's JBoss World, the presentations will be made available shortly afterwards. I'll also be writing some blog entries to go through different aspects in more detail, again after JBoss World.