JSR 94 Compliant Search Engines: Has anyone here used any?

Folks,
We're currently migrating a 3270 application to a servlet/jsp application. As part of this migration we're
getting rid of our mainframe rules engine (largely because of horrendous licensing I understand).
I've done some research and found out about JSR 94 (the proposed standard API for Rules Engines).
Is anyone here currently using or in the process of implementing a JSR 94 compliant rules engine?
Did you decide against JSR 94?
Any input is appreciated.
BTW - Here's the link for those who haven't seen JSR 94.
http://www.jcp.org/en/jsr/detail?id=094

There are a number of complient rules engines. however it would seem that the APi development has
not quite finished yet (although I doubt there will be any further changes).
Part of the Reference Implementation is a wrapper that uses the Jess rules engine
http://herzberg.ca.sandia.gov/jess/
Another free engine that claims support for JSR94 is drules
http://drools.org/
Please note that I have not used either of these implementations.
matfud

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