The development of the plugin is in progress. Most of the regular features are working, but I still need to make the “set permissions quickly” and “copy permissions” form in the backend management section.
However, there are some problems that I’m facing at the moment. I can’t figure out how to hide the comments of hidden posts. At the moment, users without access to a protected post can still read the comments by visiting the comments feed.
I’ve signed up for a plugin hosting account at wordpress.org so hopefully the first release of the plugin will be available soon.