This is the online compiled version hosted on Github Pages:
http://gaearon.github.io/flux-react-router-example
To build it, I run this command in the project root:
./node_modules/.bin/webpack --config ./webpack.config.production.js
It uses hash instead of pushstate so Github Page relative URL works.
If you want to run example locally, git clone it and run it instead:
npm install
npm start