Non DRM Mobipocket format is already supported on the Kindle - just drag and drop.
As glued to the net as we all are, there's vast quantities of content that is not available online.
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).
How do you load other eBooks onto the Kindle? Just add Amazon DRM.
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.