suraj.sun writes "AT&T and Comcast, two of the nation's largest Internet service providers, are expected to be among a group of ISPs that will cooperate with the music industry in battling illegal file sharing, three sources close to the companies told CNET News. The RIAA said last month that it had enlisted the help of ISPs as part of a new antipiracy campaign. The RIAA has declined to identify which ISPs or how many. It's important to note that none of the half dozen or so ISPs involved has signed agreements. But as it stands, AT&T and Comcast are among the companies that have indicated they wish to participate in what the RIAA calls a 'graduated response program.'"