Well, probably not. We will not be making a public upload facility. Too much security concerns.
We see no need for any further capabilities for registered user uploads. It is already possible to keep images from view until an user with the appropriated rights publishes it.
BTW, it is pretty crass to start a new thread for this. This deprives the forum readers of the information from the original thread http://www.zenphoto.org/support/topic.php?id=10890 .
That is where, by the way, I did tell you how to accomplish this. Another source is http://www.zenphoto.org/news/an-overview-of-zenphoto-users