This is really cool, and I've wanted something like this to hack on for ages. I'm a big fan of being able to present concepts along with code that you can run,

This is really cool, and I've wanted something like this to hack on for ages. I'm a big fan of being able to present concepts along with code that you can run, and I'm also a huge fan of not having to rely on a server backend. I have a static blog where I try to talk about various math concepts which I illustrate with code. I hacked together a pseudo-literate html sort of presentation, and it works just fine, but it's inflexible.