@Jonie Sorry, don't know about Paperwhite but I have to assume it also backs it up to your account which you can then view in the app on your PC.
I've also noticed an update in the app(s) that has to do with notes & flashcards. I haven't taken the time to research yet, but it seems they're developping stuff in that area.
I can't imagine there is no faster/better way than having to create a twitteraccount en go through there; what a work you must have had with that.
Luckily you can see the upside of that (knowing them by heart).
