Recently, the skype network went down. You can read all about it here.
However, the exciting take away from this is (quoting from the link above) "In order to restore Skype functionality, the Skype engineering and operations team introduced hundreds of instances of the Skype software into the P2P network to act as dedicated supernodes, which we nick-named “mega-supernodes,” to provide enough temporary supernode capacity to accelerate the recovery of the peer-to-peer cloud."
Which is exactly my idea of how a self-healing peer-2-peer system should behave. Introducing more nodes into the mix should ideally help solve scaling and availability issues, which is exactly what the Skype team did. I would like to congratulate them for that!!