It's as good a place to post as any, walrus!
I think that right now you'd have a tough time getting your textbooks onto any of these readers. You'd probably have to do the conversion yourself, it'd probably take you most of the year to get something you could actually read & use.
In practical terms, in order for textbooks to get onto some sort of reader, the publishers would have to get behind it and push hard -- not terribly likely at the moment.
I think it will happen, mind you, just that it'll take a while. I think it's just too natural an idea for it to not happen at all. It'll likely penetrate the college level first, and then trickle down to the public schools.
It wouldn't surprise me if these readers started showing in college literature classes in the next couple of years -- a lot of those texts are public domain, and are available in project gutenberg right now, so....
