digital ink (Score 2)

Did anyone here see an article recently (whether it appeared on /. or not I am not sure) about a new type of digital paper with tiny pods that look somewhat like iMac mouseballs? When a pod is charged they black side surfaces (or is that the other way around?) and the white falls to the bottom. With the proper preparation this method can produce very sharp digital layouts. It is bendable and might be the first step towards a single sheet newspaper.