@47 (sort of @44), That’s how I use mine… I have nothing DRMed on mine at the moment, haven’t found the need to. Uses standard mobi format, and there’s plenty of freely available public-domain goodness to go around.
I’m still frustrated by Amazon’s attitude toward their customers, but I’ve only fed them the entrance fee. So far, the device has been good to me, and worth the money. If only the money went to someone I respected a little more.