Foodio54 is an extremely large database of restaurants (currently only in the US that collects rating data about those restaurants. We then use collaborative filtering to make predictions about restaurants you might like that you haven't visited yet (or at least rated. Foodio54 offers much more than just a big directory of restaurants. In addition to making educated guesses about new restaurants you might like we can also combine multiple user profiles to find the best restaurants for those users. So for example if two people are going on a date we can offer a list of restaurants that they might both enjoy. We also allow our users to create profile pages to share their favorite restaurants with anyone.