Re: Other ebook readers
skitter, you've probably considered this already, but I have to nag: please don't read books on iPhones. They damage your eyes in the long run.
There are a couple of readers out there (Kindle, Nook, etc. -- no favourites, just bringing up big names) that use Pearl e-ink technology, which doesn't display texts with the front-lit light on the screen (i.e., you need proper light source to read them as you would with a real book). Some even come with lightings coming from the edge (not the front!) of the screen to provide light source at bedside.
Most people take a significant amount of time to read. So the way the book is lit is very important!