Is there enough added convenience here to justify a hardware purchase? Hardware is a tough sell. Make it work with bluetooth alone, and then I'll be interested.
a) They said it might cost only .40 to make. They'll make that back on one purchase. b) To be competitive, you have to give it away. If you sign up for a merchant account, most offer the hardware for free and those are big machines.
Btw, what do you mean make it work with bluetooth? The dongle?