@ali: I know what your getting at, but that would need a complete prerendered book, as you said. I guess, you could add that to the viewers. On the other hand, page flipping like in real books will not be an option with the e-ink image refresh times that are available now. That will probably take a few more years, because i havent seen or heard of a prototype thats working with fast page updates yet.
I personally yould like to see prerendering options an especially prerendered indexes and fast search algorithms which should render quite fast.
Well, all e-ink device owners in the next few month will be pioneers anyway, so dont expect a perfect product. The good ones will show up in about two years. Then i will ditch the iLiad and get the iLiad 2.0 or a device from Plasticlogic or the reading design study from philips.