Got the SAR to work after creating a new directory, "deploy.last", inside the deploy directory. Found this mentioned here:
http://www.datadisk.co.uk/html_docs/java_app/jboss5/jboss5_deployment.htm
and here:
http://www.mastertheboss.com/en/jboss-howto/42-jboss-config/86-jboss-deploy-application.html
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