This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
Stateful or stateless is just EJB configuration option. Underlying bean still implements same "javax.ejb.SessionBean" interface. For bean implementing this interface, remove() method is optional and so is annotation.