If you have an Apple unique device identifier, you may want to check to see if it was stolen.  A hacker group called AnonymousIRC claims it exposed 1,000,001 UDIDs for Apple devices.  To see if yours was stolen follow these steps:

 

  1. Plug your iPhone/iPad into your computer
  2. Load up iTunes
  3. Click on your device
  4. Click 'Summary'
  5. Click on your serial number
  6. You should now see your UDID