They have a long interview with the Edge people and you can find it here. Just a snippet:
Q: The eDGe is the first e-reader with a dual display. Or maybe the first netbook with an e-reader display… How did you come up with this design?
AM: We saw a gap in the e-reader market for a device that could combine reading with note taking, Web surfing, email, Word/PowerPoint/Excel and music and video playing and recording, which would ultimately enhance the learning process as well. My teenaged kids confirmed it as well, saying they couldn’t do much with just a dedicated e-reader. They wanted Internet connectivity, email, Facebook, games; they’re part of a very tech-savvy generation that has high expectations for gadgets.
This really looks like a potentially interesting device. Sort of like what the Nook would like to be if it could. Having equal-sized e-ink and LCD screens would be a lot more useful than just that tiny little color strip on the Nook.