IRC and Chat
- "IRC networks break apart when the number of chat rooms exceeds
about 2000, with the number of simultaneous users somewhere between 5000
and 10000. I think this is for reasons having to do with the sociology
that the IRC technology can support, more than sheer number of users.
The number of max-sized IRC networks in the world is less than 20; say
200.000 simultaneous IRC users on 20.000 chatrooms. Number of listeners
per group is a lot higher than 4."
Internet Technical Notes and Resources
by Henning Schulzrinne