Urk, I take it you haven't used Lync outside of Windows? The Mac version is horrible mixture of Silverlight+HTML5+Standalone App in which none of the mentioned

Urk, I take it you haven't used Lync outside of Windows? The Mac version is horrible mixture of Silverlight+HTML5+Standalone App in which none of the mentioned pieces can't handle the full functionality. On the other hand Skype and Hipchat just works (unless you get hit by the Skype bugs:p).