For my JPA course at the University of Applied Sciences in Bern, Switzerland I created a new website: persistence.ch
There you can find some information about Java Persistence API and a lot of links to JPA implementations and other useful resources.
The section containing the scripts is protected. You can write an email to the address below and I will send you username and passsword.
Also if you have any comments, don’t hesitate to contact me: firstname.lastname@example.org