Jetty tells you where it's unpacking the webapp, and it's (on windows) down under /Deployment and Settings//blah blah - look for the Jetty output, it changes every time u re-deploy.
Tomcat goes under the jboss deployment area - search on localhost if that's your machine name, you'll find it. (It's something crazy like default/tmp/deploy/server/default/deploy/work/.....)
Anyone figure out how to get the unpackWARs switch working??