JPA/EclipseLink and Glassfish

Example source code using JSF2, EclipseLink, Glassfish 3, Helios, EJB3:  http://svn2.xp-dev.com/svn/JSF-tuts/jsf-blank
Set a connection pool.  One per database.  Put the DB name after the URL (jdbc:mysql://:3306/dbNameHere)
set the JNDI resource to use this pool.  Refer to it in the code.

The jta-data-source must be referred to here, else Glassfish will use its default server