Death to the papyrus eaters of the West!
Long live the Mighty Electro-Phoretic Priests and their gifts from the Gods!
All right, now that everyone knows where I stand (would rather burn most of my books for warmth than pack and move them again), I have to sat that I agree that the Kindle could be more disruptive.
Amazon is all ready seen as a paradigm shaker, and they have little to no bad press WRT hardware or customer service (to wods: Root Kit) to overcome.
Someone more tech savvy: could a mini-USB dongle be added to a Reader 500/505? Do not see such a need for a keyboard, but wifi would be nice, especially for travelers.
As dumb as the Kindle looks, I can see it being more comforting to people--the Reader is nearly too slick, too miminalist for some people to not be intimidated. The big buttons, chunky profile, and keyboard have a 'down-home' feel to them.
I can see the Kindle winning, if this is a competition, though I don't know that I'd be happy about it.