I'm still not sure that the issue has been framed correctly.
Let's first assert something: computers copy things. There is no technical difference between file sharing networks, Kazaa, ftp, http (the web). The difference is the intent on which that technology is used. I could serve songs via web, ftp, file share, udp, it doesn't matter... computers create copies.
The RIAA wants to limit copies of copyrighted material. Fair enough. But there is no technology (that I'm aware of) which can restrict the copying of copyrighted material without placing severe restrictions on free copying.
We allow some technologies to exist *even though* they can be used in commissions of crimes (ie, guns).
My take is this: it is the entertainment industry's responsiblity to create some sort of technological answer, or keep suing people. But as a citizen in this society, I don't think they should be allowed to get extreme tort relief because some people use the technology in a illegal mannor. In other words, they can't restrict any technology that can facilitate illegal copies of copyrighted works when a the same technology has legal uses. It becomes their business problem, not government or societies.