This is a nice idea, especially for a case where a website is collaboratively edited. I don't love Google Docs for solo projects, and I don't enjoy using it, but its collaborative editing features are so good and reliable that I can't escape it. Being able to suggest and accept changes with commenting among a group of people would be really nice for a website for a collective, say.

That said, a bit of small, hopefully constructive feedback. The impact of this would be a bit bigger if there were more blog posts, so that by the time you reveal you're using google docs it feels more like a practical application and less like a very quick demo. Also, while I understand that there's a sort of "coder who doesn't do design" aesthetic, it might be good to at least change the colors a bit so that there's a bit more magic of transformation. This looks a bit too much like, well, a Google doc, and you want to establish that something cool is going on that couldn't be done with just an index of publicly visible google docs.