I've been experimenting with Teamspeak recently, and I'm really impressed with it as a tool for domainers and webmasters. It was developed as a tool to help teams of gamers work together when playing multi-user role playing games. It allows a voice communication system to be superimposed on the main program running on a computer. It's hands free if you use a voice activated microphone and head phones, and conversations cane be recorded.
You can find out more about it in this wikipedia article - https://en.wikipedia.org/wiki/TeamSpeak
I am considering adding a Teamspeak channel to Net Barons