once you discover eugenics you can't just stop there! What is evolution anyway?

IF there is a deal to be made where you can get the Chrubuntu experience in the classroom then I think it's viable. I remember early phasing in of laptops for classrooms in the iBook days. It was not the best solution. Even walking students through the install process and setting up that account could be good for those kids interested in CS / Creative Tech. But I agree on your point that having staff that can make a good curriculum is more important than the actual brand of parts you put in front of them.