The Kindle supports Mobipocket files directly. You don't need to write a script to do that.
The Kindle has many flaws, but it does allow you to read a few different non-DRM formats.
Typically ebook readers are larger than PMP's with larger screens. If you're going to read for a few hours, then the screen of a typical PMP becomes pretty eye-straining (due to size, contrast, and brightness).
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.