1) Yes, we started developing Seam before the .par archive stuff had been finalized. We should change the examples to use the stuff from the EJB3 public draft.
2) jboss-app.xml enables scoped classloading in JBoss, this is standard JBoss stuff. jboss-beans.xml is configuration for the jboss microcontainer, it is not needed when running in a java ee 5 environment.
Thanks for the reply.