JDO vs. Entity Beans: A Modest Proposal
Subject:   Take a look at WebObjects
Date:   2002-03-17 06:00:57
From:   who_man
Enterprise Objects Framework of WebObjects has real solutions for this issue and it covers both server and client side requirements with excellent flexibility in handling object distribution and synchronization, and transactions. Apple is doing a vey poor job of letting the Java developer community even be aware of it.

If you are generally interested in persistent object database issues, and if you have access to a Mac OS X computer, also check out FScript. It may be the real replacement of SQL for OO development instead of a wrapper.