I don't think this is something that is likely to be done for JMS 2. The EG is currently trying to figure out a higher level abstraction for synchronous send and receive. Details here: http://java.net/projects/jms-spec/lists/jsr343-experts/archive.
Marina, Pete, do you know where the JMS 2.0 expert group is in terms of being able to observe a CDI event ? Are they looking into this direction ? Because if there are it would be interesting to see enterprise services (such as Tx, security...) to CDI observers.
Does any of you have a wish-list for the MDB improvements in the EJB spec? This should be a purely EJB related changes, as the JMS 2.0 EG is looking carefully at the overall JMS revamp.
thanks,
-marina
-- Antonio Goncalves Software architect and Java Champion