Arstechnica has an article describing the ongoing struggle against ISP's deliberately degrading P2P traffic.
With ten days left to file, telcos, trade, and advocacy groups are sending the Federal Communications Commission their statements on whether Comcast and other ISPs purposefully degrade peer to peer traffic, and if so, what to do about it. Not surprisingly, the debate pits broadband content providers and advocacy groups against the big telcos, cable companies, and their trade association backers.
Note that Broadband content providers fighting against Comcasts' intentional restrictions includes youtube, American Library Association, National Association of Realtors, Sony Electronics, among others.