They just put out a press release detailing Epson's 3rd generation controller chip for E-ink's epaper screen. From the press release:
Found in most major electronic reader devices, Epson EPD controllers and E Ink's EPD low-power consumption screen technology have been key factors in the rapid growth of the eReader market and the expanding range of mobile applications, such as eBooks, eNewspapers, tablet PCs, laptop secondary displays, eNotebooks, and eDictionaries.
The new Epson display controller includes a high-performance color engine that can be easily configured to match customers' color and CFA needs. It has a built-in dither function to minimize host overhead, and can be connected to any host processor through a 16-bit parallel or TFT LCD bus.
As with all Epson EPD controllers, the S1D13524 allows multiregional and concurrent display updates. The advanced sequencer engine, power management, I2C thermal sensor and serial flash support a variety of popular functions.