This is a problem where technology is actually a very huge obstacle, probably a huger one than marketing. How are you gonna get all that data? It's not structur

This is a problem where technology is actually a very huge obstacle, probably a huger one than marketing. How are you gonna get all that data? It's not structured on the web so you can't easily crawl it. You have to rely on people uploading it to you, but why would they do that when you don't have a huge user-base yet? Think about the friction a restaurant has to overcome: they have to hire someone to create XML files (don't expect regular owners to know how to do this)... then they have to regularly update it...