Jailbreak Your Kindle for Dead Simple Screensaver Customization If you’re less than delighted with the default screensaver pack on the Kindle relief is just a simple hack and a reboot away.
This thread is mainly for Kindle Keyboard (Kindle 3) hacks. There's a whole wiki page for Kindle Touch hacks! Comprehensive List of Kindle Hacks/Modifications
Kindle Wallpapers A collection of custom screensavers for the Amazon Kindle.
Book Review of Kindle Screensavers – Vintage Pin-ups on Ruled By Books