Ah yes. This is a problem with the resource_filename() method from the pkg_resources module. A possible workaround (taken from http://osdir.com/ml/python.distutils.devel/2005-10/msg00043.html) is to include the pycontrol egg in the zip file. If you do this, I'd try and yank as many of the WSDLS out of the WSDL_CACHE_DIR as possible to keep your package small.
I may be able to patch this, although using resource_filename() in pkg_resources was a big time saver for us so I'll need to look into another way of doing it that's more friendly for this type of thing but just as portable.
-Matt
Nimbostratus