Granted the PDF converter seems to have some trouble with graphics PDF's, but for books the converter works very well.
Non DRM Mobipocket format is already supported on the Kindle - just drag and drop.
The Kindle is already able to read more than just Amazon DRMed content, it can handle a number of formats.
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.