Amazon can do a lot of money only from selling kindle, like Apple does with the iPod.
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.
Granted the PDF converter seems to have some trouble with graphics PDF's, but for books the converter works very well.
The Kindle supports Mobipocket files directly. You don't need to write a script to do that.
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