Over at Engadget they have put up a really well balanced review of the Entourage Edge. Ian and myself saw this intriguing book shaped device at CES earlier this year.
I was quite enthusiatic about the concept and some of the use interface and could see its targetted audience of replacing student textbooks working well, I was not a great fan of the rather large and to be honest a bit clunky form factor.
With two screens one of e-Ink and one a more normal lcd and running Android it is probably the shape of things to come but the I am pretty sure the future shape will be sleeker and slimmer. Anyway I highly recommend reading the review.