I had been wanting to remark on a specific fair use study(beware of PDF) earlier last week, but never got around to it. Thankfully, Tim Lee on has a to the point post on the Technology Liberation Front.
One more: The Free Expression Policy Project at the Brennan Center for Justice at NYU Law School just put out their study entitled, “Will Fair Use Survive?“. You can find the full PDF here. Of course, feel free to quote it, make limited copies or excerpts of it to criticize and discuss it, and make personal, non-commercial copies of it–it's your right!