Here's another One Piece wallpaper, this time of Nami. Sadly the background didn't quite go the way I wanted (wanted it to be orange), but it just wouldn't work. But other than that it turned out okay. Hope you enjoy Check out more here: doubleu42.deviantart.com/galle…
The Amazon Kindle has a 4-bit grey scale 800x600 screen. With the right tools, you can change the images it displays for the screen saver to any 800x600 PNG or JPEG image, but you have to do some work to get them to work right.
In GIMP, I either split them into RGB or desaturated them (depending on the image), tweaked the color levels, then converted them to a custom pallet with 16 shades of gray with Floyd-Steinberg dithering.
The results look pretty good on the Kindle, and I imagine they'll work just fine on other eBook readers.