Editors' note, July 8, 2015: See CNET's guide to Internet radio services for a more up-to-date evaluation of this service, along with an analysis of how it compares to competitors.
TuneIn Radio has an intuitive interface that makes it a snap to listen to streaming radio while you're on the move. It offers more than 50,000 stations and 120,000 shows from around the globe, plus, with the help of your iPhone's GPS, it can even serve up all of your local favorites.
Upon launch, TuneIn lets you drill down to exactly what you want to listen to. You can browse local radio, recommended stations, stations for different languages, and even podcasts. You can also choose from categories like sports or talk radio.
Like other radio-streaming apps, TuneIn gives you an enormous list of music genres to choose from, each with a long list of options from around the world, with local choices at the top.