Juxio is a new (beta) site for creating visual mash-ups. Also, this can be used as a way to teach digital storytelling. What makes Juxio such an attractive option is how user friendly and polished this site is. Everything is drag-n-drop and even has an iPhone app for mobility.
I highly recommend checking out Juxio by clicking here.
For a much more detailed review check out Kelly Tenkely's wonderful blog!!