We just added some coverage to the EJB FAQ for the following areas :
-- non-Java EE web container access to remote EJBs
-- relationship between @EJB annotation and ejb-ref/ejb-local-ref .xml
elements
-- resolving remote @EJB/ejb-ref dependencies
-- cross-appserver instance remote ejb access
-- clarifications regarding appserv-rt.jar MANIFEST classpath
https://glassfish.dev.java.net/javaee5/ejb/EJB_FAQ.html