Got JBoss working with Object Store too .. The problem was to do with the classpath settings of JBoss .. All the ejb-jar files from deploy directory needed to be copied to lib/ext ..The same with Poet Object Database too .. Also because of this, the hot deploy feature of JBoss doesn't work !!!
I'd like to know how you get an object db working with jboss. Do they come with resource adapters or some other kind of driver? Do you know why the classes need to be in lib/ext? This would be good to add to the documentation.