Remember all those HQN pre-order freebies (I checked... they aren't free anymore) back in
September? I woke up, checked my email on my phone and thought for a second my Amazon account had been hacked when I saw all the order confirmation emails. I'd sent them to my Paperwhite, and when I grabbed it, it wouldn't turn on and had some screen saver message that I needed to register device. Had to restart it, then all the books were delivered, and I proceeded to delete them so they wouldn't drain the battery indexing.
Moral of the story: in the future I shall send pre-orders I'm not necessarily interested in reading immediately to a different device!