The Kindle supports Mobipocket files directly. You don't need to write a script to do that.
Devices like the Sony Reader, Cybook, and Kindle DO NOT have glowing LCD screens.
There are converters available from Amazon and/or Mobi for pdf and doc files.
The Kindle has many flaws, but it does allow you to read a few different non-DRM formats.
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.