ZMGC Application empowers members with on-line tools, by providing a free infrastructure to easily exchange, analyse and disseminate information in a scalable, non-blocking manner using only Open Source software build by the community for the community. It is about building lasting and deep solidarity versus cheap and fast Facebook or Twitter campaigns
https://github.com/TZM/tzm-blade/blob/master/public/js/socket.js#L6
this needs to take care of the port provided by AppFog/Heroku as currently it is hard coded.
you can see it here http://serene-depths-3284.herokuapp.com/
references: https://devcenter.heroku.com/articles/using-socket-io-with-node-js-on-heroku