Well this is definitely a great idea... let me take inventory of my unused pi's and I will see if I can get one running.
One last question, is this just for Pi's? Or would other low usage arm boards qualify?
Right now it is just for R-Pi. But the program might be expanded to other hardware someday.
Yeah there's been a few requests to accept others, especially BeagleBone. It could be a possibility down the line.