It appears that the days of black and white E-Ink are very numbered. Most likely in the near future, the only black E-Ink book readers you will see are very low end and maybe ad supported Kindles HA!

quote from source:Ubergizmo

It looks like Fujitsu are next up to the plate with the unveiling of its latest color e-Paper Module. Designed to be used in eReaders, the color e-Paper Module uses Cholesteric LCD technology instead of traditional LCDs that has been in use all this time.

Cholesteric liquid crystals don’t require polarizing plates, reflecting plates, color filters or back lights, which means that they can be thin, light and bright. Fujitsu also decided to replace Windows with Linux, leading to increased performance of the module. No word on when we’ll be seeing it in use, but from what we’ve seen so far it looks pretty impressive.