I have a bookcase full of textbooks of $60-$120 a piece that I'd love to have digitized for like 10-20 bucks per kindle-readable book.
Rebuying it on Amazon usually costs the same ridiculously high price or higher, and the books aren't always prepared nicely either.
I think this is actually a great business idea. Imagine you could just send in, or drop off books that you then receive in DRM free glorious PDF or other nice e-book formats.
Would it work legally?
edit: wtf there's a community built around book scanning http://www.diybookscanner.org/