Why EJB 3.X rocks? I summarized my view in this JavaWorld article: "EJB 3: From legacy technology to secret weapon". It provides especially answers for questions, which are frequently asked, especially before, my Java EE projects and in trainings. It covers the basics stuff - a condensed excerpt from the first chapter of a book I'm working on.
NEW: Online Workhop Effective WebApps without Frameworks is also coming to: MUC Airport.