I have at various points used IRC more or less actively. It's necessary for Bitcoin r&d more or less. I've also used Zephyr more often in the past (MIT has a lo

I have at various points used IRC more or less actively. It's necessary for Bitcoin r&d more or less. I've also used Zephyr more often in the past (MIT has a lot of users), and found it's ability to handle topics in a channel (and diversions) easier to work with than IRCs single stream.