I think Quaint is awesome, but I am also into JS (or CoffeeScript really) since it runs in the browser and in Node.js. I was thinking of starting with the PEG.js http://pegjs.majda.cz/online online UI and hacking it so that certain types of delimited expressions in a document would insert themselves into the grammar. Seems like it would be a way to cheat and get something like Quaint for Node and the browser without having to write a parser etc.
