When I worked at a dash-mounted video camera company, where we manufactured the hardware and software for police to use dash cams, I talked to one of our users and found out that they were using our system in a revolutionary manner.
After they mirandized their suspects they would put them in the back of one of their cruisers. Then in full view of the suspects they would switch off the screen on the dash-mounted camera system so that it looked liked they'd turned it off. They hadn't. Instead they had just turned off the screen, but the camera, the audio recording, and the system were all still on and recording.
Usually the suspects would begin planning their "defense." They would talk about what actually happened and in many cases what their "stories" would be once they were taken to the police station. Since they were already mirandized everything that the camera captured could be used in court against them.
After hearing this I spoke to my boss and we developed a "covert recording" button. A button that the officer could push that would set the system up for this type of backseat recording. In less than a month we had a differentiator from our competition.
It's because of this experience that I'm continually amazed that Amazon can't produce screen savers that are personalized. Why not have a program that would make the screen saver for the Kindle the book cover of the book that was last read. Or better yet, have a compilation of book covers of the books in that Kindle's library. And these are just off the top of my head.
I got my touch yesterday, and although I'm happy with it, compared to the older Kindles, not quite impressed compared to the iPad, this one niggling thing seems like such a loss. Not only that, this is one thing from one customer that would greatly add to the appeal of the technology, . . . think about all the other great ideas out there.