A great set of Java EE examples (REST, EntityManager, EJB, CDI, Web Services, JMS, Transactions, Security ...), created by the Tomcat EE guys
If you need more, just request an example.
Thanks Jon for the hint!
NEW 2016: Java EE 7 Workshops: Bootstrap, Effective, Architectures, April, 4th-6th, Munich's Airport
On demand workshops: Java EE 7 Bootstrap, Effective Java EE 7 and NEW: Java EE 7 Testing are available for streaming