I am studying EJB using the tutorials available on the Internet. This one's is not clicking.. :-(. I plan to study EJB using a book, but not sure which one!! I will use JBoss as the server.
I recommend "Mastering EJB". One drawback (for your situation) however is that it does not contain any information specific to a particular application server, and the code samples and build files and all are for Weblogic or the Sun application server. It's a general difficulty in getting started with EJB that many important things are left unspecified and depend on the application server so that you have to learn an application server at the same time.