People have been wondering if the Wii-U would be sold in anything but white, or if they’d head down the 3DS road and come out in varying colours. Despite all the curiosity Nintendo has stayed pretty quiet. The white Wii U has been the only option until recently- a black one joined it on BestBuy’s online listing.
At this time there’s no official confirmation from Nintendo, but it seems unlikely that they would photoshop up a black Wii-U and list it on their website without some sort of official nod from Nintendo. Stranger things have happened.