Your comments are a bit misinformed. Please do some more research before posting next time. The ClassLoader and RMI semantics you talked about is a JBoss issue and not an JBoss AOP issue at all.
1. RMI pass-by-value CAN be enforced in JBoss land.
2. ClassLoaders can be scoped in JBoss land.
3. JBoss AOP maintains serial version id of original class, so it is possible to serialize a JBoss AOPized class to a non-JBossAop client.