Apple iOS 5 has new feature called iCloud, with the help of iCloud users can remotely lock there iPhone or iPad, Erase the data remotely and also locate the lost iPhone or iPad easily. When you update your iPhone, iPad, or iPod touch to iOS 5, your favorite Apple apps become seamlessly integrated with iCloud. With the help of iCloud you can also take the backup of your device easily, read the instruction here to use iCLoud on your Device.
After the setup of iCloud on your device you can enjoy all other features like Remote Lock, Remote Wipe and Find my iPhone or iPad. Learn here how you can Remotely Lock Your iPhone, iPad & Erase Data With iCloud