Update: Check out this blog entry with the creator of the IOIO featuring my photo: engineerblogs.org/2012/03/an-interview-with-ytai-ben-tsvi...
This Sparkfun treat arrived late last week and I have been utterly consumed by my class until now. So I broke out the new Android IOIO board from Sparkfun, a convenient package all wrapped up and ready for easy access from the Dalvik platform. I have the board cabled to my Nook Color.
In this photo, the app on the left, "Hello IOIO" simply toggles the yellow LED next to the microcontroller. The RED LED signals power. This board requires external power and can power the attached Android device if there is enough current to power everything in the circuit.
It's a convenient platform. One can imagine using it as a versatile physical computing interface for common and inexpensive devices like the Nook or cast-off Android phones.