If the site isn't loading for you (I was getting nginx errors for a bit before it finally loaded for me), here's the github repo: https://github.com/nddrylliog/jsmad
That's great news though! Bear with us as we try to handle the traffic :) And reload from time to time until it works.
Edit: all static assets are now served by nginx, and the default track is cached on our server instead of being proxied by node.js all the way. Wish we had CORS at official.fm!