A cheap casioppeia allows me to read ebooks around 2001.
Non DRM Mobipocket format is already supported on the Kindle - just drag and drop.
Plenty of free e-books in Mobipocket format show up fine on Kindle.
Hacker Igor Skochinsky used DRM to load Mobipocket books onto his Kindle. Using a series of scripts, he's able to convert eBook files to Amazon's AZW format and then add the necessary serial number DRM, specialized per an individual's particular 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.