Um, Amazon? Not sure if anyone told you, but most of the functionality that was previously reserved for your own Kindle and Kindle 2 e-book readers is now available for free on Apple’s white-hot iPhone. Believe it or not, Amazon has somehow certified that a Kindle app be allowed out on the ever-expanding App Store free of charge, though a few limitations are thrown in to be sure.Naturally, anyone who uses the iPhone as their main e-reader will lose out on the more expansion e-ink display, and they’ll certainly