title: Facebook auto respond to like button
body: <p>I'd like people to receive a message in their inbox when they like my fanpage, and i'm wondering what's the best way to go about this?</p>
  
  <p>I don't know if I can use the SDK to do it because there's no guarantee they will be viewing a canvas when they actually click the like button.  They could be clicking the like button from the side bar, from a friend's page, from the official page wall, etc.  </p>
  
  <p>Other ideas?</p>