The Linux World article
Kernel space: E-paper support for Linux by Jaya Kumar is a technical description of the unique aspects of persistent e-paper displays and techniques for driving E Ink's Apollo and Metronome controllers.
Apollo is used by the Cybook Gen3, Amazon Kindle, and Sony PRS-500, while (the newer) Metronome is used by the Sony PRS-505.
Anyone want to roll their own E Ink Reader? This article certainly makes this appear possible, but still a daunting task.