The quick start guide doesn't have any examples yet but keep checking for updates. In the meantime, there is a downloadable pdf file available from
which is a companion guide for Enterprise JavaBeans by Richard Monson-Haefel (O'Reilly books).
You really need the book and the pdf but the book is excellent and definitely worth owning if you are learning about EJBs. The pdf file also has the source code, deployment files and ant files.
It's still in beta but the examples I've done have all worked.