Discovered a cool article from Boxes and Arrows today:
Ten Quotable Moments, Challenges and Responses for UI Designers
I've heard all of these objections in various design meetings -- they describe many of the issues interaction designers encounter. In my lunch with George last week, we talked about how the elearning community (and education in general) needs to learn more from user-centered design and usability. You could substitute "learner" or "student" for "user" everywhere in this document.