If you take AS trunk source in a few minutes, you may notice a few things have been removed. To address JBAS-7563, JRMPInvoker & JRMPInvokerHA will be removed. Some related classes/resources will also be removed.
JSR-160 support (JBAS-7818) replaces most of the uses of JRMPInvoker. If you need high availability or transactional support, EJB session beans should be used.
Classes RMIAdapter & RMIAdapterExt are also being removed with this change. Any references to RMIAdapter can be changed to use JSR-160 (MBeanServerConnection) support. There is a code example of getting the MBeanServerConnection here http://community.jboss.org/wiki/HowDoIGetRemoteAccessToMyMBean or see the sources for twiddle or shutdown commands.
Again, this is for the AS trunk (6.0 CR1 target). I passed the AS smoke tests and cluster unit tests with this change.