Yes, seeing this post makes me want to acquire one and do this for fun. Maybe buy an older one from fleaBay? Doubtless there are sites out there to help with the process. New task unlocked!

Edit: Cursory reading says be very aware of the firmware on the device as that dictates jailbreakability. Newer firmware is more difficult. Makes sense. Also found kindlemodding.org for more brain food. Good luck!