You can write private posts on WordPress, meaning only you can read/edit it. Not even the site admin can view them. (Note: The posts are still readable from the database, however, so don’t get too personal!).

Private posts are useful for capturing information that should be kept hidden from the public. For example, I just wrote my first private post about authentication changes made to the interoperability site. On the down side, I’m not sure if it’s possible to allow read-access to a group of users. Private posts are mainly for individuals.