Please, add a new option as answer (Don't Repeat.. So, please read all answers first). The answer with largest vote would be chosen (this can be checked from time to time in the end of each month). Please, participate.
In the previous poll, The Ansible was the runner-up.
Interestingly, it's now the highest voted with a mighty +4.
I don't think the chatroom name should be changed. But if it was to change, my favorite proposal is
The Dirac is a communication medium in James Blish's series Cities in Flight. It is nowhere as well-known as Ursula K. Le Guin's ansible (I don't remember any other author calling their communication device a Dirac), but it's more appropriate: an ansible is a point-to-point communication device, like a personal messaging system, whereas the Dirac instantly broadcasts all messages all over the universe, like a chatroom.