Thanks for the note about the dead link. Not sure how the plugin did it (have no copy), but via the object model (http://www.zenphoto.org/news/zenphotos-object-model-framework/) it would be possible to go through all albums recursivley and set those without any content to unpublished.
Which is probably what the plugin did as well. Maybe contact me via http://www.zenphoto.org/pages/contact/ and I get back to you so you could a copy of the plugin. Could be an easy fix and then we could host it on our "unsupported" repository at least.
