Last week I had some time to have a look at new JBPM 5 features. It's visible a change of direction: from what I can see, it seems that Drool business rules and BPMN 2.0 will be the new paradigms for writing business processes. I have added an introduction to BPMN from what I have understood: You can read it here: BPMN tutorial

Feedbacks, as usual, are highly welcome!