Hibernate - Spring - Cloud SQL

We've had a few questions around using App Engine with Hibernate, Spring and Cloud SQL

Keith Mukai has a good How-To here 
http://blog.essaytagger.com/2011/11/spring-hibernate-on-google-app-engines.html

and a guestbook sample project is published here:

http://code.google.com/p/guestbook-spring-hibernate/

J