Well, I was just saying the other day, "I wonder if Warner Music have signed up to Snocap yet", and low and behold, they have. I think my life is now complete.
Snocap, of course, is the company set up by original Napster founder Shawn Fanning. They have built some technology which can track what music is being shared via P2P networks. The idea is that legit subscription-based P2P companies use the Snocap technology to track what music is being shared by their members, so they can pass the relevant royalty fees on to the labels.
All four of the majors are now signed up to Snocap which means their system will be able to track music in the entire combined catalogue of EMI, SonyBMG, Warner and Universal, as well as the many affiliated independents. The challenge now for Snocap is that the emerging legit P2P companies opt to use their technology. Both Snocap and those legit P2P operators will then have to hope the punters currently using illegal networks like Kazaa et al for free will be persuaded / forced / intimidated into switching to the subscription based systems.