Agreed:

Rather than using Froyo, I prefer get the SDK in order to develop some applications which can use the E-ink screen.
eDGe / pocket eDGe both are very nice devices contains two kinds of screens.
I'd like to use E-ink more than just read ebooks.

Like Nook. Nook is develop by 600x944 resolution.
Upper: E-ink, 600x 800
Lower: LCD, 480x144

If SDK of eDGe allow user to develop application like this way or other else which can let us control E-ink side,
I'll be very appreciate.