This week's book giveaways are in the Refactoring and Agile forums. We're giving away four copies each of Re-engineering Legacy Software and Docker in Action and have the authors on-line! See this thread and this one for details.
First, JPA is not beans. JPA is a specification about data persistence. There are no beans, but what is called "Entities". Entites are accessed via an entity manager. It can be used on a EJB3 container or even in J2SE. Again, JPA is a specification. It is implemented by a few JPA containers, like Hibernate or Toplink.