LGTM w/ caveat: gwt-user.jar and gwt-dev.jar show up in target/www/WEB-INF/lib but shouldn't. This is a result of copyWebapp copying everything, including provided jars. Try gwt-maven-plugin 2.2.0-1 or specifically add gwt-user into the clean section.
http://gwt-code-reviews.appspot.com/1407804/ -- http://groups.google.com/group/Google-Web-Toolkit-Contributors
