If you don't want a plain black Nintendo DSi, Colorware is more than happy to take your money to customize yours however you wish. Above, you can see my creation: "Vomitus Easterus." Lovely, no?
You can choose the colors for basically every piece of plastic on the handheld, but it'll cost you a whopping $374 for a DSi with every part customized. Alternately, you can send yours in and pay just $174. But really, I think my combo of pastels above is priceless. [Colorware via Engadget]