You know that song? On the radio? By that band? What's it called? You know, the one with the guitars? That really catchy one?
An app for the iPhone purports to answer questions like that. It's called Shazam. You've undoubtedly heard of it. Apple featured the app in one of its cute TV spots touting the iPhone: "You know when you don't know what song is playing? And it's driving you crazy? With the Shazam app from the App Store, you just hold your iPhone to the song and in seconds you'll know who sings it and where to get it."