I'm sure Amazon will be more than happy to sell its e-books for viewing on "Kindle for iPad" (provided Apple doesn't try to shut their app down as "duplicate functionality"). If we consider the Kindle hardware device as a way of priming the pump for digital book adoption, it seems to have worked.<p>It will be interesting to see what pricing looks like between iBooks and Kindle books (I noticed a number of $14.99 options in the presentation when most Kindle books are $9.99). Even though I'm a Mac/iTunes user, currently Amazon gets the bulk of my digital music money, because they offer better deals than Apple and have made the download to iTunes process pretty painless. My guess is they'll find numerous ways to operate within the new ecosystem the iPad creates.