Hey @chjj ....
We recently wrapped marked.js as a ruby gem for easy integration into rails apps.
This is a similar approach to what https://github.com/rails/jquery-rails does for jquery.
Our repo is at: https://github.com/eastmedia/marked-rails
We'd be happy to maintain it - but out of deference wanted to offer you the opportunity to take over the repo if you were interested.
Thank you for the offer.
I'm not really a ruby guy, so you're more than welcome to maintain a ruby/rails binding for it. Thanks for bringing marked to the ruby world. :)