It's just a proof of concept, really, but already super fun!! I'm looking forward to seeing some real slick apps. I'm even more excited to see mashups!! Remember when the web had mashups for like a month before they were crushed?? On BSV we can finally have mashups again, like anyone can put up any app that does anything new with the bitstagram data, and combine it with anything else on the chain, lots already to work with. :D