Thans to 1Dgaf over at the Gamers With Jobs forums for posting about Gabbly.com. Basically, this little pop-up chatroom makes any URL a chatroom. Even this one!
Simply add gabbly.com before any website and you and others visiting the site can chat in real-time.
For example, enter http://gabbly.com/randomlygenerated.blogspot.com into your browser's address bar and you can start chatting with the 2 other bored people who read this blog. Give it a try.