NetBeans allows one to add the "JAX-WS 2.1" library to a project, but the current ebuild uses the system copy of the JAX-WS 2.0 libraries. This is probably the cause of bug 249839, and more generally, is likely to lead to disappointment. ;-)
As we do not have JAX-WS 2.1 bundled, i use in netbeans 6.7 beta the jars bundled with netbeans, so this problem should be fixed, if not, then pls reopen the bug.