That's one of the hardest parts is to narrow use cases down.

What we're focusing on at the moment is for consumers. It provides a way to synchronize/aggregate your photos from across multiple photo services into one location (that you have the option to own/control). We haven't built all of the connectors but that's in the pipeline.

From a technical perspective, decoupling the service from the database and filesystem (basically allowing users to provide their own) opens up a lot of opportunities. We're paying a lot of attention to which opportunities look the most interesting.

There's an entirely separate use case for businesses which we haven't even touched. Any business that was weary of putting their photos on Flickr now has a compelling alternative that will satisfy any of their paranoia.