Yes, it’s totally geeky, but hey we have to be true to ourselves right? If you have your own IRC chat client (we recommend Textual) you can join by connecting to the GeekShed server listed below adding the ‘maccast’ channel.
irc.geekshed.net port 6667
You can also use this Flash based client below (yes, we know Flash is lame) if you’d like. You may need to grant your browser permission to use this client (yes, again lame, but it’s what we have. Really just use Textual instead ;) ).