As you probably know, we made a pretty significant rev of the Team Explorer in VS 2012.  As part of that we did a re-think of the Team Members Power Tool to provide a much nicer collaboration experience than what we could do in VS 2010.  The Power Tools Team Collaboration tool supports Lync and Live Messenger but it also has an extensibility model so you can plug in other communication technologies.  Nico has now updated the Skype provider on Codeplex to work with the new Team Members Power Tool.  Check it out: http://tfscollab.codeplex.com/

Brian