My 'Open Source Strategic Engagements' team at MSFT is totally using it. Slack is awesome. It has a good Skype integration, which is how we can call each other.

My 'Open Source Strategic Engagements' team at MSFT is totally using it. Slack is awesome. It has a good Skype integration, which is how we can call each other. It's the best chatroom solution I've seen in a while. Skype and Lync are trying to do something else and we're very happily using all of them!