Also please make it extremely secure and encrypted. Microsoft and Skype are doing the world a huge disservice right now by making Skype fully wiretappable by any and all law enforcement agencies and even the police in US. The world deserves better.
Really? We're still throwing out this extremely inaccurate information? Honestly? All they did was change supernodes for directory lookups. Almost every time the data is peer-to-peer unless someone is behind full-cone-NAT which REQUIRES tunneling the data.
If you're going to downvote, at least mention why.