Is mustache.github.com not good enough as a universal templating language?

I don't agree with ever design decision made for the syntax, and I've not used jinja, but it has the universal part handled quite well.

The idea of a roasted PHP is interesting. It's not a no brainer in the way CoffeeScript is though. There's no real choice of language in the client-side, but there is on the server side.

Server side devs can just learn ruby/python/.NET/Scala. Client side devs are probs best switching to JavaScript or something very similar.