Xtreme Enterprise has shown photos of their clear case mod for the Nintendo DS Lite.
Their SHOCK! DS Lite replacement cases lets you swap out the shell and buttons of your system with new colors incluiding yellow, blue, red, black and a translucent case that lets you see all the gory innards of your DS Lite. The replacement cases rund $34.90 each, and should be available in the coming weeks.
They have posted a photo walkthrough of the somewhat involved and delicate installation process here.