Cheng has a simple example showing how to use EJB 3.1 EA in a WebApp. This builds on the EJB 3.1 implementation Available at the Update Center for GFv3.

Cheng's Note has all the details, including the sources for all 4 Java files. With the fast startup of GFv3, it just takes a few minutes to go through the example. As always, please send feedback on both implementation and specification.