If you are new to the Java EE 5 platform
, here a couple of great resources to get you started :
First is a fairly lengthy article from SDN covering the major design goals of the release and some great examples of how Java EE 5 removes much of the boilerplate code that was required in J2EE 1.4.
Second, Ken and Sridatta have put together a screencast covering the basics of the Java EE 5 SDK - just so you know what to do once you've downloaded it. There a more screencasts to come.
OK, that should be enough to get you started on Java EE 5.