I am Tim Stephenson, I've been into BPM as well as process simulation for a number of years and Activiti for 18 months. Great job!
I've made a couple of small patches and hope to step this up a little. My interests are varied but here's a few:
- enhance entities for JAXB serialisation support. - start process instance from mail (hopefully using the org.activiti.engine.impl.mail package). - pick up some bugs, docs and forum queries too. - ability to query different history information and return in a single ordered list.