Ever want to change the images in your Kindle’s screensaver? It’s as easy as putting new 600 x 800 images into the system/ folder on your Kindle – and then running a script which finishes the update. At least, according to one web post (citing a discussion on a mobile books forum).
It links to the script to run, though it’s important to also read the page’s comments. Some users are having trouble running the update, and there may be a better way to accomplish this!
Caveat: I’ve never tried this myself. (And I’m not sure if it works for all Kindles, or only for the Kindle 2.) But I’m definitely visiting that web page when I’m finally tired of my Kindle’s pre-loaded screensavers!