The Voice Band app for the iPhone is without a doubt the best app I have ever seen for the iPhone. And I saw the Jersey Shore iPhone app.
Voice Band is just so awesome! All you need for voice band is the ability to make sounds come out of your mouth. You have several instruments to choose from. Add your recorded vocals at the end and you have an awesome ready to go demo track.
Wavemachine Labs has created something epic here. Check out the video to see the Voice Band app in action and read the words below mine to find out the details of this awesome app.