I am also using the JWSDP JAXB implementation and have created a JAR containing appropriate WS file descriptors. This deployed fine before I added JAXB unmarshalling code and the JBoss deployer can't find the JAXB classes. More specifically the error is (of course):
Essentially, I want to know where to add the JAXB jar files. I don't want to "randomly" add them to folders in my server configuration. I'd prefer a more supported answer.
javax.xml.bind.JAXBException must be loadable by the LoaderRepository that is used for your deployment. If have not configured scoped class loading than there is only one LR in your server.
server/yourconfig/lib is a good place