So yeah, Guile-powered Emacs exists! http://www.emacswiki.org/emacs/GuileEmacs

It's still in an early stage, but it works. That emacswiki post points you in the right direction, but if you use the Guix package manager, you can give it a try: "guix package -i guile-emacs"

Mostly at this point it needs people working on it and playing around with it. Considering you're fairly excited about it, maybe you should give it a spin? :)