Guvnor 5.3.0.CR1 will work on JBoss AS 7.0.1!
A big thanks to Mattias Nilsson Grip, who has succeeded in getting Guvnor to work on JBoss AS 7.0.1 in the non-web profile and made a nice pull request for us. That's the power of open source at work :)
Based on that, it was pretty easy to analyze our problem with the web profile and produce a guvnor war that works on web and non-web profile alike. Look for the jboss-as-7.0 specific war file in the distribution.
We'll release 5.3.0.CR1 soon so you can download it, but if you feel brave enough to experiment with a snapshot, you can download a nightly build. Let us know of any issues you find on our user forum or in our issue tracker.