Burton did it 3 years ago, now The Gap takes it mainstream-- clothing with integrated music. The Hoodio, powered by Wild Planet, comes with a built in FM radio, controls on the sleeve and speakers in the hood... I didn't realize kids were still listening to the radio.
The innovation here is in the way the radio and speakers snap to the jacket. The snaps are conductive so the simple act of attaching them also enables them.
$68 at gap.com