[InclinedPlane]

Technically the Pebble doesn't use e-ink, which is why they call it "e-paper". It's actually a type of passive LCD which uses 1-bit of memory located along-side each and every pixel in order to keep track of state, which vastly reduces the power requirements. Unlike e-ink memory lcds still require power to maintain an image, but the amount is very small (similar to an ordinary lcd watch, for example) so battery life is still quite excellent.

This is the display the Pebble uses: http://www.sharpmemorylcd.com/1-26-inch-memory-lcd.html

[drivebyacct2]

Was this cheaper than real e-ink or what?

Do you know if this is what is done for the displays on jump drives as well or are those true e-ink?

[InclinedPlane]

I don't know about cheaper, but certainly more available. You can just buy these memory lcd displays commercially. I think it probably takes a lot more work to procure actual e-ink displays. I believe the jump drives you're talking about do use e-ink, since they are completely unpowered when disconnected and don't contain batteries.