Could this be one of the casings for the new iPod Nano 4G? Engadget Spansih managed to get a photo of the case that was on the floor. While this does mean that there is going to be one – I hope, it still does not mean Apple has actually confirm it themselves.
The shape actually looks like the one that Kevin Rose was saying; but hey, maybe it could be a false positive.
Source & Images – Engadget Spanish (Google Translate)