Reading my ADT newsletter I saw this article - JBoss Drools over SOA. In particular it says:
By incorporating the Drools project, JEMS will enable dynamic processing and intelligent routing within business processes based on service level agreements or other business rules, Fricke says
Now this is great - I have argued that SOA and business rules are a great partnership and so I was delighted to see JBoss come to the same conclusion. I don't have much to add beyond what I have said before on SOA.
One other thing I met Charles Forgy yesterday when he came by the Blaze Advisor office. Since our acquisition of RulesPower we have begun to integrate RETE III (not the RETE I in most other products including Drools) into the Blaze Advisor product and it was a blast to meet the man himself - very cool!
Lastly I have made some comments on JESS v commercial rules products here and some of these comments apply to Drools too but I am not as familiar with Drools (yet).