He's referring to an IRC channel. If you don't know what IRC is then a simple Google or whatever search should get you the basics which is all you need.
I don't know much about IRC myself but what I do know is that IRC is the perfect game lobby. IRC has all those file transfer and other stuff I know nothing about but the basic use is that it's a chat room which supports private/direct chats and a list of the people currently in the channel.
Heh, I don't even have mIRC installed.
Edit
Step-by-step of what eXtortion says below (does not install mIRC):
1. Go to: www.gamesurge.net/chat/ (requires Java)
2. When it loads you'll automatically connect to GameSurge - let it finish.
3. Type into the command thingy: /nick nickname , where nickname is your desired nickname.
4. Type: /join #purepazaak to join the channel
5. If you join and no one is there, I urge you to stay there if you can incase someone else comes along
6. Let's say there's a bunch of people connected. To announce that you're free to play a match, just type the chat message and press Enter.
7. What you want to do now will vary, but to let's say you want start a private chat session to respond to someone's offer (and tell them your details like your or their IP, etc). Double-click their name from the list of people and a new chat window will appear in the Private taskbar section.
8. Organise and play!
You can copy and paste the commands.
<{POST_SNAPBACK}>
Please come to the IRC Chat Room, PLEASE, PLEASE, PLEASE I BEG !