Example of RequestFactory + JDO?

[Micah Caldwell]

Does anyone know of any examples that use RequestFactory & JDO?  On http://code.google.com/webtoolkit/doc/latest/DevGuideRequestFactory.html it says, "[RequestFactory] is designed to be used with an ORM layer like JDO or JPA on the server, although this is not required."

I have been unable to locate any examples of such a case anywhere on the web.  Perhaps I am searching for the wrong terms but it seems like everyone (except me) is already intimately familiar with JDO from previous experience whereas this project is the first time I have worked with either JDO or RequestFactory and trying to put them together properly through separate sets of isolated examples is proving difficult.