I think one of the important features the eDGe is missing is the ability to view and select items from the library on the e-ink side. I believe this is a very important feature to have especially when the lcd side is in "standby" or in a future hibernate mode.
I use my eDGe at work, writing notes during meetings and recalling from previous notes. As it stands I have to have both the e-ink and lcd sides active in order to recall a previous journal entry. Having the library viewable through the e-ink side will enable users to switch books or journal entries without having to power up the lcd side resulting in longer battery usage and better overall effeciency of the eDGe.

Steed