Looks really well executed. I would definitely do some legwork on the operator front. I tackled this same problem about 2 years ago and found that operators simply aren't able to understand the need for this type of service (maybe it was the timing). Keep in mind that many don't have a website and some don't even use email, so explaining why they need a "mobile" website makes for a potentially hard sale.

Someone discussed online ordering as a possible revenue model, from my experiences with operators they weren't interested in this approach. Most orders they received over the phone would involve customization and the cost of handling order problems simply outweighed the benefit of not requiring their bartender to take an order over the phone. However, I could see this being big for chinese restaurants. Most customers order by number, and many chinese restaurants are carry out exclusively. Remove potential language barriers during order taking, increase total ordering, win-win.

Anyway, best of luck!