Unfortunately, there is a showstopping bug in the RC9 release that makes it unusable on Tomcat. I'm working with the EJB3 team to get this sorted. Right now, this is the only problem blocking the 1.1.BETA release.
That's weird, I have just installed JBoss-4.0.5.GA and installed then updated the EJB RC9 release and everything worked out fine.
Another thing, I have updated JBPM to version 3.1.3 and the examples worked fine.
I said it was unusable on Tomcat, not on JBoss.