I had a debian chroot on mine. The official firmware is just running awesome WM on X11 so you can run normal arm Linux software pretty easily.
Nice! Seems like a nice-to-have tablet! Does the framerate suck? My mom sometimes uses it to read digital books, but she's kind of tired of having to buy 'official' books
through the kindle store, sign in, wait for it to connect to the internet.
(for educational purposes only, do not try at home)
You can download books and send them via email to your Kindle. I do this all the time (with only free books, of course ;) )
Or you can use Calibre to get around the size limitations of email.
The framerate was surprisingly good. Plenty for text editing and IRC.