I've encountered several references to the EMF JPA persistence
implementation (http://www.eclipsecon.org/2007/index.php?page=sub/&id=4071)
developed by Shaun Smith of Oracle and Stephan Eberle of Bosch. Having
researched the same topic myself early last year and encountered some
intractable problems with an earlier, non-Java5-generics-enabled version of
EMF I'm naturally interested to learn more about Shaun and Eberle's
approach. Unfortunately I couldn't make it to EclipseCon 2007. Does anyone
know whether their work has been published?