This actually seems like a much bigger market than just autistic children. I would imagine that many parents that have iPad-crazed kids would would gladly give

This actually seems like a much bigger market than just autistic children. I would imagine that many parents that have iPad-crazed kids would would gladly give their kids an app to learn new words instead of Angry Birds. A child would probably be more interested and learn faster if it was Mom's voice talking instead of a robot. Another interesting case that comes to mind is how Clay Christiansen, author of Innovator's Dilemma, used Rosetta Stone to practice speaking again after having a stroke. I would imagine too that you could scale pretty quickly by allowing users to create Flashcard sets, and then other users can buy the flash card sets and rate them. This could turn into a crowdsourced Rosetta Stone pretty quickly.