Sony is bringing out the first eInk-based consumer product
in July -- an eBook reader called "LIBRIé". Runs on four AAA batteries; you can read about 10,000 pages before the batteries need to be replaced. Can store about 500 books.
It's not an LCD or anything like it. It's about as white as paper, and can be read at any light-level a book can. And a pixel doesn't require power to maintain a state, only to change one, so battery drain is minimal. It's also very lightweight. Here's a link...