The civil-uncivil ingame chat is a kinda clumzy thing to use. 
Maybe im missing something, but you can see max 3 people and it hard to keep track of the conversation.
I looked for an existing one and couldn't. So i made it.
Server: 
eu.undernet.org  or   
us.undernet.org
Channel:  
#nodiatis
You can access them with  programs like 
xChat or 
mIRC, or from web-clients like  
mibbit.com.
.. and if there is an existing channel already, could someone tell me about it ?