I've recently fallen in love with Discord due to its combination of features from both skype and teamspeak. Basically it has the skype IM system with the teamspeak voice chat system.
I feel it would be superior to what we currently have.
At the very least, could we create an official discord server with a link on the front page?
For those who haven't tried discord, I'd highly recommend giving it a try. It won me over instantly when raptor suggested it; it is superior in many ways to both teamspeak and skype.
Discord can run in an internet browser as well, for those people who don't like downloading an application to run.