This is very nice. I'm curious about your technology stack for putting this all together, if you wouldn't mind sharing some behind the scenes I'd be most grateful.
Node.JS at the core. Redis and AWS SimpleDB for the Database. Major caching at all levels (frontend/backend). Response times of less than 50ms for most calls. Web Sockets(SocketIO) for real time communications.
The frontend is built entirely in AngularJS with a few jQuery integrations. We write all our CSS in LESS and compile it using Grunt.
We used PHP (LAMP) for our last major Project and I can say that for what we are trying to achieve, NodeJS is much much much faster(10x) and leaner(we manage the same traffic with 20% of the server resources used on our last project with PHP)