You guys are missing the point. It's intended to be used with Pow. This way you don't have to bother with manually starting & stopping servers or remembering ports or whatever. This domain allows you to have access your sites in the same way from any device in your network. Not just your dev machine. Handy! And it works. What's not to like then?
http://37signals.com/svn/posts/3191-announcing-pow-040-with-...