Title says it all. USB, Ethernet, Video in and out, more processing power than beaglebone. Requires an external JTAG controller.
A robotics kit from CMU developed with children in mind. It has a visual drag-and-drop programming paradigm. http://t.co/RJ5NcwY4
Use epaper and a very low power rf interface to create a programmable electronic sign (powered by solar cell or battery?). Can it be made completely wireless (no power or wired interface)?
APC has developed a 49$ Android computer. This might be an interesting platform for an embedded system for somebody who wants to learn app development on an Android system. It should have very powerful low level control of hardware and a very nice user interface.