This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
JMS is covered on the part 1 exam. I believe it came into existance as part of j2EE 1.3. In the container JMS it is embodied as MDB which entered the EJB spec at 2.0. But I don't think you have to know the MDB aspects.