I've been looking for an easy to understand rule engine and JRuleEngine looks almost exactly what I've been searching for. I've noticed that the code in SVN was updated recently.

Questions:

1) Is this project becoming active again?
2) What's the recommended version: the packaged 1.3 or current trunk?
3) Any thoughts about the comments found here: http://tech-voyage.blogspot.com/2011/07/getting-jruleengine-to-do-what-it.html