<http://schema.org/image>
<http://rack.3.mshcdn.com/media/ZgkyMDEyLzEyLzA0LzcxL3N0dW1ibGV1cG9uLmMwRS5qcGcKcAl0aHVtYgkxMjAweDYyNyMKZQlqcGc/55e1d122/610/stumbleupon-comes-to-the-iphone-and-android-0205154c89.jpg>
<http://mashable.com/2010/08/19/stumbleupon-iphone-android-app/>