Peer inside the box

Musical curiosity is no dangerous thing with Pandora's iPhone app for music discovery, except that you'll soon be hooked. Take the Web radio engine's original concept of suggesting music by comparing the rhythms of a song you might like with one you already do and add to it a sleek interface, ratings icons, and quick links to bookmark the song or artist, or buy the track from iTunes. Add an explanation of why the bots picked your song to the ability to view the song progress, create a new station from a song or artist, and send the song to a friend. Then kick back and enjoy the very decent streaming audio quality, full-screen album art that round out the flawless program.