daniel_reetz wrote:In a more perfect world, we'd all be able to sign up for time on a DIY book scanner at a neighborhood co-op or something.
Yes! I have often thought of this as a possibility -- community, dormitory, or rental units available. My only question here is... how to you disavow any liability with respect to copyright? I mean, I don't really respect copyright.

but I'd like to find some kind of model where these things could be rented or community-built that wouldn't bring the law upon the owner.
I had an intriguing conversation at BarCampGR this last weekend with a lawyer who was attending. We talked about "fair use" in copyright law. Happily, she has a case she's been researching about fair use and so was familiar with it. I asked specifically about a co-op/non-profit (much like BarCamp) and whether it could be regarded as fair use. She responded favorably, but I didn't pay her to research my specific question. So I didn't push her for an official legal opinion. I'll have to ask her how much research would cost.
Nevertheless, I got the impression from her that provided some reasonable precautions were taken, one can stay within the realm of fair use. I think that if one keeps a low profile and a non-commercial focus, one doesn't present a big litigation target. (Though the Supreme Court thought that it fair use for you to record Charlie's Angels off the air and then hand a copy of the Betamax to your neighbor, but that was before Disney bought the DMCA.)
Keep in mind that any action brought against someone operating a shared book scanner will have to overcome the fact that Xerox machines now operate legally in public libraries. And they legally charge patrons for the service.