You can't put MC 2.0 in JBoss-4.0.x there hasn't even been a beta release of it yet. We should certainly break out the container module into a seperate project, like I suggested before with a 1.x branch that contains stable stuff and and 2.x branch that is under development. Besides, the api isn't stable yet. e.g. The MetaData repository stuff that is in the aop integration is still WIP and won't be what is currently used when it is finished. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3972598#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...