Nintendo might be the best videogame company on earth, but occasionally they waste some real opportunities. Like Mario Paint on the DS. It's pleading for it. But Wired's How-To Wiki shows us how to turn it into a sweet digital sketchbook in the meantime with Colors. All you need to install it is a DS-compatible flash cartridge and a microSD card. Colors is a fairly basic (no layers or undo yet) but still impressive paint app, and more features, like DS-to-DS collaborative painting, are coming. You can use a full-size Wacom stylus if the DS one cramps your style, and export via Wi-Fi or microSD. To see what you can really do, check out this amazing Rembrandt replica by Jason Dunn.
Wah this is nice. I bought a DS Lite but then realized I don't want to spend a lot of money on games =P and want it to be a bit more "useful" for the money, as well. So I've been looking into the flash cart thing. This seems a lot like the Graffiti app in Facebook - control colour, line width, and transparency. As illustrated above, you can do a LOT with even that minimal amount of control.