http://www.dropzap.com (web demo)
  http://www.youtube.com/watch?v=qkOnq9wEsSk
  http://itunes.apple.com/us/app/dropzap/id338490375?mt=8

  http://www.dropzap2.com (web demo)
  http://www.youtube.com/watch?v=7XWVS6G1RRg
  http://itunes.apple.com/us/app/dropzap-2/id378977964?mt=8