I see you moved away from Java. Have you guys tried JBoss Seam (http://www.jboss.com/products/seam)? If not I strongly suggest you give it a try. If you love RoR I'm almost sure you'd appreciate JBoss Seam.
On the other hand, what puts me off is that it seems to require an application container. I wonder if that would have been the case if it had not been developed by employees of JBoss... So far I was very happy with Tomcat, and I am reluctant to move to a full-fledged application server.