Are you a fan of the growing mobile social networking game foursquare? Now you can earn a "Foodie" badge in foursquare by checking into Zagat-rated restaurants in New York, Los Angeles, Chicago, Boston and San Francisco. And that's not all – our editors are also adding insider tips to the game in all five cities, and putting together a “Meet the Mayor” feature. Want to get in on the foursquare fun? It's easy. Click here to learn more.