The Kindle has a built in cell receiver so that you can wirelessly browse, preview and purchase books using one-click.
Granted the PDF converter seems to have some trouble with graphics PDF's, but for books the converter works very well.
Use Mobipocket software to convert PDFs to that format so you can read them on Kindle.
The Kindle only allows the reading of Amazon DRM-protected content.
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.