We have to admit that we changed the setup for the documentation and forgot to update the links on the admin plugins. We actually think it is nice to read the testimonials but of course you should see the plugin documentation. That has not dissapeared, it's just in a different location.

The url for the official functions guide is now http://www.zenphoto.org/documentation/

The plugins are all found under http://www.zenphoto.org/documentation/li_plugins.html