Wow. This is awesome. Any way to encourage being more present with your family or whoever you are eating with is a great idea. And by doing something different, this could give them some nice publicity.
One of Ryan's big points in a lot of his articles is about work life balance. He explains his entire day which is great. Spending time with family and eating right are all important items that a lot of people forget about.
Looks like a great idea. I think a lot of small local business will like it.
I agree with the others who say the screenshots are a little too small (fonts).
Also, while I think it's great that you are trying to capture emails right on the home page, it might be good if the focus shifted a little bit to the product and a little less to the sign up form. I would maybe recommend putting more weight of the design into the product (what problem does it solve for me) as opposed to "give me your email". More screenshots, etc.. would be good and still keep a nice signup form on the home page.