At Stanford, students have found a way to get mobile phones to make music. As you'll see, the iPhone can now reproduce the sounds of the ocarina, a twelve thousand year old flute-like instrument. That's the hi-tech way of doing it. There's also the low-tech way of getting the same result. In this classic bit of YouTube goodness, you'll see a big piece of broccoli doubling as an ocarina. Never can get enough of this one.
You can learn more about the Stanford Mobile Phone Orchestra here.