Hot off the digital equivalent of the presses...
http://www.eeherald.com/section/news/nws201112162.html
"IHS iSuppli has reported unit sales of pure-play ebook reader in 2011to reach 27.1 million units, up a resounding 108 percent from 13.0 million in 2010. The vast majority of these displays are monochrome."
iSuppli expects the growth rates to flatten out, but also thinks education will be a big market for dedicated reading devices.
Cue me smirking at the memories of predictions that tablets would destroy the dedicated market in 3, 2, 1...