SeekDroid is Android app for tracking android device if get lost or stolen.Now you can get it free ($0.99) for limited time at Amazon Android appstore.
SeekDroid Android app let you manage your device remotely after installed on your Android device,you can locate your device, remotely lock it, see all the recent calls since you misplaced it, and even wipe the device with little effort.
The main features are
Locate your Android device anywhere
Remotely enable GPS and display location on the map