I personally use an Android Tablet (one of these $99 HP Touchpads). It is certainly not as comfortable as one of the e-paper readers, but the added functionalit

I personally use an Android Tablet (one of these $99 HP Touchpads). It is certainly not as comfortable as one of the e-paper readers, but the added functionality is extremely useful. It is just great to not just read stuff, but work with documents, i.e. add notes and highlights to your books, copy&paste excerpts in a text document for future use, etc.