The ObJectRelationalBridge - OJB team are frantically busy at the moment preparing for their relase of version 1.0
This has been a moveable target for over a year with 7 release candidates. However, there have been lots of changes during this period with a "flexible" understanding of what to change while in release candidate mode.
But they are really close to a release now, the work that is happing (and fast) at the moment is all about polishing the unit tests and ensuring they work with as many dbms as possible.
They have also been working hard on the documentation which is now large and helpful, that includes a new think called ojb_blank which makes starting a new project much easier (see the getting started documentation for details)
We have used OJB for real on several projects and found it excellent although somewhat complicated to get used to for complex relationships and big transactions (the newer docs make huge difference). It does seem quite memory hungry though, even with proxies.
PS OJB is for accessing SQL databases for loading, saving and accessing as java objects, generally without having to write any SQL making applications more object orientated and more flexible (between different dbms and between different versions of the data structures).
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