Thank you for your advices.
One last question and I will start working on that: I have several servers that I will have to deploy. I don't use either EJB/JMS nor servlts/JSF (what Tomcat i read is best for). So in other word i will have to deploy a simple j2se application(server). So my question is ... is jboss a good/the best choise for that ? If it isn't, can you suggest another AS ?
Thank you