There is an interesting protection App available for your IPad, IPhone. It's called Alarm Lock and it costs $3.00 from ITunes. Once installed, you activate it with a 4 digit code. Once activated, if anyone tries to move the item it sets off a very loud alarm, you get to choose the alarm sound. It will keep making a very loud noise until you deactivate with by entering in the same code. The developer's website is: http://www.alarmlock007.com/
Once you sign up and register you will be asked to login or create a Twitter account which is how you will be notified if your IPad goes missing and it will transmit photos of whoever is using it and their location.