Regarding JBoss 3.2.4RC1: There is a messy little exception thrown by the jmx-console web-app keeping you off using the jmx stuff properly. The XMLOutputter cannot be found during the compilation of the inspectMBean. Is this due some major changes?
A workaround is to place the old jdom.jar in the lib folder of the used configuration.
Another very annoying thing is the reload of the java applet in the web-console after each and every resize or even click on a link in the applet area. What is this all about? I haven't encountered such behaviour in JBoss 3.2.3