I am a member of several of the great disconnected Instant Messaging networks. My account on Yahoo I use regularly, I have an account on Skype that I use intermittently, an account on MSN which I use with a very limited scope, and I know I have an AOL Instant Messenger account which I haven't loaded in years. Even among my regular IM pals, most don't have a microphone attached, so I don't get to use even voice chat with them. Now Skype has added video to their chat. If I ever use this, it will probably just to be to prove that it works. Skype's audio is more than sufficient for me at the moment.
What do you think? What do you use? (Tell Me.)
Check out Skype for yourself.
Try the new Yahoo Messenger with voice.