Very cool. What I've been really searching for is a large e-ink display. I'd love to do a RaspPi powered "cork board".
Oh nice, not sure how large you're thinking but if it's under 6 inches you could probably get one decently cheap from Alibaba(the Chinese Amazon). I think the larger displays (10 inches+) were only manufactured for special use cases like the Kindle DX hence the limited availability. Cool idea though!
That looks neat. I honestly just used a standard wall mount display. ;)