Napster creator Fanning strikes Sony Snocap deal

Shawn Fanning always seemed like a bit of a dickheard quite frankly, but I suppose I have to admit that Napster did have some innovations... Now he's signed a deal with Sony for some kind of new music tracking system called Snocap. What is it?

"Snocap is a copyright management and filtering system that allows users to trade legitimate songs over peer to peer networks."

A great new innovation that will allow legal filesharing to thrive? Or another technique for megacorporations to try and limit the choices for legitimate users?