There's also the Pixel Qi screen, originally developed for OLPC and looking to be launched in actual products this year.

It has a mode that switches off the backlight and becomes a high-res monochrome screen perfect for reading and use in sunlight. It can even emulate the e-ink capability of turning off the power and the screen stays on with static content to some extent, though this requires more engineering to support than just plugging it in the place of a standard LCD.

I find the B&W mode charmingly retro (particularly when showing 1080p video) and would very much like to buy a linux&arm based tablet or netbook using it.

Recent demo videos:

http://armdevices.net/2010/01/08/mary-lou-jepsen-shows-pixel...

http://armdevices.net/2010/01/08/charbax-tests-pixel-qi-at-c...

http://armdevices.net/2010/01/08/notion-ink-pixel-qi-tablet-...