I'd be interested in working on it.  I think it'd be low cost to get it up and going; even if it doesn't work, you're out a few hundred bucks in dev units and a few weeks' work.  The biggest problem, IMO, is finding a vendor that will dropship pre-flashed units to customers.  If you can find that, the rest is cake.  It's considerably more expensive if you have to have the units shipped to some central facility for flashing before they hit the doorstep.