The Distributed Computing Industry Association and its "P4P Working Group" is working on a new peer-to-peer protocol, called Proactive network Provider Participation for P2P or P4P. It's described as a "carrier-grade peer-to-peer file transfer system." What might be surprising to some is that not only are companies such as LimeWire, BitTorrent, and Skype in the list of member companies, but so are AT&T and Verizon. [...] The P4P protocol aims to reduce traffic by using network topology data to select peers intelligently, instead of at random, thus increasing routing efficiency. It's obvious: the more routers or hops traffic has to take, the less efficient.