I use iBooks, Kindle, and Nook for different books (to me, they're similar enough that it's like comparing HD TVs -- 6 of one, half-dozen of another), but I'd like to settle on one and roll into my future e-library from there. Any thoughts on that? This new "no buying directly through an app without paying Apple 30%" policy is troubling to me. Anybody have any insights how this will affect this niche in the future? I don't want to start building my library via Nook or Kindle and then have those books eventually not be available to be read on my iPad ... Or have them make like Borders, or something.