Shapeways and Soundcloud have come together to offer a unique way of customizing your iPhone case.
It's very simple, you connect to SoundCloud, choose your favorite sound from the library or upload a sound that is personal to you. Using a simple UI you then choose the waveform shape from your sound and have it 3d printed as part of your iPhone case in either black or white nylon.
Want to see for yourself? Go here.