Fyi, i've added a sandbox module [1] to try out support for Relax WS interfaces and posted to the Tuscany blog with how to use it: http://apache-tuscany.blogspot.com/2008/02/tuscany-sca-support-for-relax-ws.html
...ant [1] https://svn.apache.org/repos/asf/incubator/tuscany/sandbox/ant/relax-ws/