This week's book giveaway is in the OCMJEA forum. We're giving away four copies of OCM Java EE 6 Enterprise Architect Exam Guide and have Paul Allen & Joseph Bambara on-line! See this thread for details.
The WSDL file can be found on page 278.
In addition, on page 279 there is a motivation to why a webservices.xml file is needed:
When developing on GlassFish v2 and supplying a web.xml deployment descriptor but no webservices.xml deployment descriptor, a servlet-based web service will not be recognized as a web service. After having supplied a webservices.xml deployment descriptor, the web service will once again appear in GlassFish.