Mike Keith, Oracle Toplink architect, persistence guru, and member of the EJB 3.0 Expert Group, gives an, in his last entry an overview of EJB 3.0, in the context of the comparison with Hibernate and especially explaining why the statement that we sometimes hear "EJB 3.0 is Hibernate" is wrong.
This blog entry as been selected as a news by The Server Side, titled "EJB 3.0 is not Hibernate" and is very active in term of comments/reaction, feel free to add yours there.
In the same time if you want to learn more about EJB 3.0 and start developing with it you can find infromation and EJB 3.0 container on OTN.