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.
OH GOD, WHAT HAPPENED TO YOUR PRICTURE! FREE iPHONES AND NOW MISSING AVATARS!!!!