Thanks for the great review.
I just got my jetBook this summer and am really enjoying it so far. I read mostly de-DRM's mobi books and it is working great so far. I was just about to venture into some txt files but decided to wait until whatever problem with txt files the new firmware is having is resolved. Also, since things are going so well so far, I've decided to hold off updating firmware until at least the next patch.
Thanks to all the active jetBook users on Mobiread for sharing all the great info on this wonderful device.