Check this out!
Plastic Logic developed 10 inch e-paper based on E-Ink technology (of course...). They claim that it's the biggest in the world. If you think that Samsung declared last week that they have developed the largest and it was a crapy 7 inch one, my choice is Plastic Logic.
This thing has a 100 pixels/inch resolution and it's capable of displaying texh and images with 4 tones of gray. They say nothing about the speed of the display.
Here it is...
P.S. Are this things ever going to be in colour?!