Official borndirty Chat Room here:
https://join.skype.com/E5V8Nw8CUkAh (copy and paste into browser)
Its using Skype so you'll need install Skype but on the plus side, it works with all Skype versions on Windows / Mac / Linux, and has history log going back 2 weeks (unlike IRC when you log off you dont get the messages you miss). Should also work with Skype for Mobile Phones.
Get Skype:
Latest version for all platforms:
http://www.skype.com/download