Yes! We had been kicking around this idea of building a version of Snapchat where all of the photos are stored in your personal cloud storage. Could we build a Twitter or Facebook that way? The problem we ran up against is how you'd choose a single storage provider to support. We came to the conclusion that you'd want some kind of transport layer to make that easy. StashKit is that transport layer combined with some widgets to make integration a breeze for devs and users.
I'm working on a little blogpost about the cool new app architectures these personal clouds suggest.