The cost is rather low as long as you keep things scaled down resolution-wise.
AFAIK, printing out a sheet of e-ink is rather cheap. It's the electrode matrix underneath that's expensive to manufacture and attach to the e-ink sheet.
So: large e-ink display, low resolution = low cost; small e-ink display, high resolution = high cost; large e-ink display, high resolution = even higher cost.
Edit: Just BTW, Motofone's display is backlit (not sure if it's mentioned in the Register's review, haven't headed there yet), but it looks rather bad at night. Oh, and the contrast seems a tad lower than on iLiad or Sony.
Last edited by orcinus; 04-11-2007 at 05:42 AM.