Laurent,
Thanks for the help... I tried the "inline" method and it works. Actually, this is how I developed and tested the plugin (using the Bundle-Classpath in the manifest file). So, for deployment, all I needed to do was manually package the service as a jar file and replace the service jar file in the plugin-packages->plugins folder with the one that I manually created.
Its a shame that the vSphere Package tool ("vSphere SDK Tools"->"Package vSphere Client plug-in") doesn't do this for you as an option in the dialog box. Perhaps as an option in a future release?
Thanks,
Steve