That's being trialed by my school as well, with all the students in year 9 getting ipads (its the smallest cohort at the moment, but its still ~200-250 people, so I'd assume the school is getting some deal with Apple/Distributors). If it goes well, it'll happen for the whole of the senior school, which is somewhere in the area of 2000 students.

Its a pretty huge undertaking, especially since the year 9s have just used them to play games at this point.