Want an overview of what’s coming up in Java EE 5.0? Sun have an article on their site which gives an introduction to the changes and new features in EE 5.0.
The main and most significant change is the introduction of the vastly ‘new and improved’ EJB 3.0 spec, which with it’s use of Java SE 5.0 annotations and the complete rewrite of how EJB Beans are implemented goes a long way to simplify EJB development.