This week I introduced my class to a cool app called find my iphone. This is an app I have recently installed on my ipad and it has a number of features that will help me if I should ever misplace of have my device stolen.
Here's how it works. Download the app from the app store (it's free). Sign in with your Apple ID on your device and turn on Find My iPhone to allow you to locate it. Then use the same Apple ID to turn on Find My iPhone on your other iOS 4.2 (or later) devices including iPhone 3G, 3GS, or iPod touch (2nd generation or later).
Find My iPhone is also included with a MobileMe subscription. As I don't have another iOS device, I can use the mobile me website, accessed from any computer to locate my ipad.
You’ll see your device’s location on a map

Pretty cool features which give users another level of physical security for their idevices.