I came back to Red Hat only a few months ago and did not contribute much to the HornetQ integration into the application server. This was a great collaboration between the AS and HornetQ teams to ensure the best experience to configure and use HornetQ.
I'd even recommend to leverage EAP6 (or JBoss AS 7.1) over standalone HornetQ servers. Wether you only need a messaging server or not, the management and deployment features brought by the AS are invaluable in production environment.
I wrote most of my contributions to EAP6 in HornetQ codebase during my first stint at Red Hat. I still remember the long hours, hard work and team work to release the best and fastest messaging provider. A few months later, we were able to reach this goal and I am happy to be back at Red Hat right on time to see the benefits of this work.
I can't wait to see what is coming next for JBoss and Red Hat.