A Wordpress plugin that pretends to be a socnet. Plug the RSS feeds or Twitter profiles into the config page and it'll show you updates as they happen. Pretends to be an RSS feed reader. Private blog posts only for other Friends that follow you. Supports IndieAuth. Cross-blog private messages.
Github: https://github.com/akirk/friends
An excellent blog post on how Wordpress backdoors work, how they're hidden, and how they're used.
How to change the site URL of a Wordpress install by altering wp-config.php.