Well, I'll be that guy and say I'm underwhelmed (no less by the link-bait headline).<p><i>and saving and sharing data without a line of backend code!</i><p>That's nice and all. However, from a glance it seems like you saved yourself about 30 lines of code in <insert-favorite-web-framework>. With heroku or appengine that's about 15 minutes from first line to first deploy.<p>No need to lock yourself into a proprietary platform here, if you ask me...