Use Mobipocket software to convert PDFs to that format so you can read them on Kindle.
As glued to the net as we all are, there's vast quantities of content that is not available online.
Amazon can do a lot of money only from selling kindle, like Apple does with the iPod.
Typically ebook readers are larger than PMP's with larger screens. If you're going to read for a few hours, then the screen of a typical PMP becomes pretty eye-straining (due to size, contrast, and brightness).
A revolutionary portable reader that wirelessly downloads books, newspapers, magazines and blogs to a crisp, high-resolution electronic paper display that looks and reads like real paper, even in bright sunlight.