A recent post on WordPress support forums asked if it were possible to restrict access to a WordPress post or page. I replied saying yes and suggested writing a plugin for that. Well, here’s a rough first pass at the plugin. So far, no internationalization and no user-configurable error message; only post content is hidden (meaning that post title and comments, if any, are still visible to all). I am sure a lot of other nice things could be added, too, but the plugin seems to be functional and not dependent on version-specific features. Check it out if you're interested...