Tohu is the project which ads Q&A and “smart form” intelligence on top of drools (and provides a very nice CSS stylable and embeddable jquery based ajax front end as well). (see project page here).
Some interesting demo videos made by solnet here explaining how it works:
(In case you are wondering, the accent you can here is New Zealand – or Middle Earth as I prefer to refer to it – perhaps only NZ and Australian citizens can tell the difference between !).