You can try out ManageEngine Applications Manager. It even has a Free Edition that allows you to monitor upto 5 JBoss servers.
More details here http://appmanager.com/monitoring-jboss.html
Live Demo http://demo.appmanager.com
Gibu K Mathew
ps : Will be glad to answer product specific queries at support at appmanager. com
Thanks for the update. Look like my search ends here.