After years of iPhone users being able to enjoy Apple's "Find my Phone" feature, Google have unveiled their own service called Android Device Manager. The service is available to Android 2.2 users, and above.
Android Device Manager lets you locate, and ring your device (turning the volume to maximum, even if the ringer is off) and will allow you to locate your lost (or stolen) phone or tablet on a map, in real-time. Google have said that Android Device Manager will let you remotely wipe your device, in case it has been stolen.
All you need to do is be signed in with your Google Account, and then use Android Device Manager. For now, there's a web-based interface, but the Mountain View-based company have promised that "there will also be an Android app to allow you to easily find and manage your devices."