View this gallery for images from Apple’s double-sided fullscreen/touchpanel patent application.
This gallery relates to the following blog entry on Hardware 2.0: When will we see a double-sided fullscreen/touchpanel iPod?
Here is the hardware schematic.
Here is the interface schematic.
Apple also seems to want to patent an alphabetical keyboard that goes “A, B, C, V, E” … I don’t think it will catch on.