Until electronic documents are as easy to mark up, modify, combine and carry as paper, it's likely the Kindle will not make great inroads into universities. That's a shame, because carrying one slim device would be far less cumbersome and painful than a pile of textbooks. It would seem like a major selling point.
Mokalus of Borg
PS - It's also hard to flip through the pages quickly to search for something.
PPS - Which I suppose you should do via keyword search if you can.