Will teachers be disappointed using school-owned iPads?

It's not personal, Sonny. It's strictly business. - Michael Corleone, The Godfather
The excitement among teachers surrounding the iPad is the biggest I've seen for any technology I can remember. By hook or by crook - grants, budget dust, training programs that throw the device in for "free," begging, and other sundry methods - iPads are creeping in. I expect by the time fall rolls around we'll have close to 200 of them scattered throughout our district of 7300 students. My techs shake their heads and mutter and I reply "job security!"
Although the iPad's been out now for over a year, management systems for the device are still pretty primative - or at least very different than those to which we are accoustomed with our regular PCs. Each iPad needs to be tied to an iTunes account through which it is managed, updated and supplied with applications. And the iTunes account will need to be an institutional account, not a personal account, if the user wants school paid applications and support.
While we can set up a variety of profiles for different "classes" of users - administrators, elementary teachers, librarians, special education teachers, etc. - with its own set of software, users will NOT be able to download any personal software, music or other media to these devices from personal accounts.
What this means is that if an educator hopes to play a game of Angry Birds or listen to a little Metallica during prep time, it ain't gonna happen. Unless the curriculum director tells us that Angry Birds or "Ride the Lightening" is approved instructional support material. Granted, a good deal of personal use of iPads can be made via a web browser. It will be interesting to see if Netflix, Pandora or Kindle apps - that can access personal media - can be justified for educational use.
We've always had a relaxed policy about personal use of school computers. Maybe too relaxed. But to my knowledge the positive attitude toward technology such a policy creates more than makes up or any problems it's caused. In managing iPads - and perhaps going into the future as Apple's Lion OS becomes more "iOS-like" - we may not have a choice in giving teachers the ability to use school technology for personal enjoyment.
I just hope not too many educators will be disappointed when they discover "It's business, not personal."
I'd be very interested in hearing from readers who have more institutional use of iPads if my observations are accurate or wildly off-base.