Windup 2.2 was primarily improving performance. That is still a big priority. For Windup 2.3, we also review the existing rules, to be more useful than just saying "this is bad" - we add links to Red Hat knowledge base, javadoc, and more meaningful messages.
Another news is that XML rules development should be easier and more smooth. As a side effect of us working on the rules, we see what's the biggest pain to achieve, what's missing, and what's not working. All that should be improved and fixed until the JBoss summit. Also, there's a new XSD for the Java EE app related rules, which will make it easy for your favorite IDE (provided it supports XSD-based XML code completion).