Actually, it's an IRC channel. So, if you're familiar with IRC, the server is irc.blitzed.org and the channel is #11thHr. If you're using ChatZilla, just click here. If you're using Firefox and want ChatZilla, you can find it here.
For the rest of you, you can chat using cgiirc.blitzed.org. You're going to change the Nickname field to whatever you want your name to be and the Channel field to #11thHr, as per the before/after images below.