...Any HTTP-based database? I mean, you can use Couch, or Redis, or whatever. You'd just have to host the server yourself. And since CORS isn't enabled AFAIK,

...Any HTTP-based database? I mean, you can use Couch, or Redis, or whatever. You'd just have to host the server yourself. And since CORS isn't enabled AFAIK, you'd have to use some kind of hack, like JSONP or whatever.