There's a pretty good short article
at PDAStreet about eBooks on PDAs picking up momentum, and schools are a huge potential market that is just starting to be tapped throught pilot programs.
It seems like eBooks (and PDAs for that matter) have apparently hit the bottom of the trough of disillusionment in Gartner's Hype Cycle
and are starting their ascent up the slope of enlightenment.
Now if the DRM issues can be resolved in a way that affords owners the same privileges of real books (letting people borrow them, pass them on to friends or family members, trade them in, sell them, use them on your device of choice), they'll really pick up steam and reach their plateau of productivity much more quickly.
More mainstream PDA sites and media outlets that can inform and educate people won't hurt either.