http://www.the-digital-reader.com/20...it-runs-html5/
sorry if this is old news, but I don't see it here. The Touch has been rooted. Turns out K5 is written mostly in HTML5/Javascript, as opposed to Java on previous models. This means old hacks won't work, but it should be easier to write new hacks. The page says it should be possible to add epub support to the reader. Maybe add covers to the home screen, since it's just a web page apparently.
I hate Java but HTML5/Javascript I can deal. Dang, too bad I can't use the touch. Maybe I need to rig something up...