I have the exact opposite experience. Reading on my N800 is hampered mainly by the lack of transreflective screen which makes reading in anything but a dim room quite fatiguing. I have no problems reading on my iPhone in all kinds of lighting, indoors and out, and as for the Kindle app, changing font sizes is trivial. As I alluded earlier, though, I'm not doing heavy-duty reading on the iPhone, just a chpater or two here or there, which come to think of it is how I read even with a book. Short attention span, maybe...