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.
Kindles can read a variety of non-proprietary, non-DRM'ed formats. They read TXT, HTML, JPEG, and non-DRM Mobi files directly.
DRM is not to prevent other files from being readable on the Kindle.
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.