Jean-Michel,
Thank you very much. The guys that worked on the EJB3/JPA stuff really broke their backs to get all that in but we are really happy with how seamless the JPA integration turned out.
We have some really nice plans for improved EJB3 support going forward that will likely make it into the 6.x release stream, we just need some time to refine it and test it, but once that’s done the whole “EJB3 story” should be extremely compelling and easy to use.