Does the seambay example work for you? It uses a standard-jaxws-endpoint-config and the request handler works fine. As for the NPE, they're always bad so I've fixed it in CVS.
The seambay example uses ejb3 and my test runs on plain tomcat with hibernate persistance.
However, I installed embedded jboss into tomcat and deployed the seambay example. The JSF part of the example runs without problems but the webservice test page displays a http 404 response for every web service invocation. Do I need to install jbossws separately?
Yes, JBossWS is a separate service in itself.