The latest version (3.2.2RC2) allows you put deployments
in a directory called deploy.last
With JBoss you can specify the sequence of deployment for MBeans.
When you have deployed your MBan - call it aBean (on which you want to invoke an operation before the server displays the message 'started') you can write another MBean - bBean. In the default no argument constructor of bBean get an instance of the MBean server , query for aBean and then ask the server to invoke the operation. Just make sure that bBean is deployed after aBean is deployed.