Here is an article on University of Notre Dame students using iPads in a project management course.
Overall, both the professor and the students had a positive experience with the iPad. Students said it was easier to collaborate and share ideas, while the professor felt less of the "wall" between him and his students that comes with the vertical laptop screen. One of the main complaints from students was not being able to write in the margins of articles, which can be done (at least on PDF files) through apps like Noterize or iAnnotate.
