You can read more about it at Esquire.com.
I found one of the special e-ink issues in Borders today and snatched it up. There's a video of the display, as well as the second display on the inside of the cover at the bottom of this post. Of course, one of the first things I did was to take the cover apart to see how it works. It's pretty simple...a small circuit board with six (yes, six) button cell batteries on it. Then there are the two displays. Esquire says the batteries should last 90 days or more and that life can be extended by storing the magazine somewhere cold, like the refrigerator or freezer. :-)
But for now, here's a video of the coolness. Enjoy!