Happn.in Makes Twitter Local

One of the great things about Twitter is that you can interact with people around the world instantly. Twitter can also be a useful tool to find out what's going on in your neighborhood and stay in touch with friends who live in your area. If you're curious what's going on in your city, check out Happn.in, a Web service that breaks down hot Twitter topics by major city to show you what people in your area are tweeting about.