Argh! What’s the name of that song? Instead of singing yourself silly trying to remember, go to www.nayio.com, where you can find the name of a tune just by humming it into your computer’s microphone. (You must hum in tune.) Nayio identifies the unique structure of a melody, then cross-references it with Napster’s music library to find potential matches. Nayio can’t, alas, teach you to sing.