Bridgestone were showing their QR-LPD (Quick Response Liquid Powder Display) displays at CES. There are reports that the display is very dim and washed out, and the refresh rate is slow. They do support color, though. Here's a short video:
Vivitek is also showing two e-readers using the QR-LPD displays (made by Delta Electronics) one is a 8.2" and the other is a large 13.1" display.