A really simple streaming app built with dstat (not installed by default on most platforms but really easy to get it installed), node.js, express and socket.io
git clone git://github.com/midnightcodr/dstat_stream_demo.git
cd dstat_stream_demo
npm install
node app.js
http://<ip>:3000/dstat
Tested with node.js v0.8.16, express 3.0.4, npm 1.1.69 on a Raspberry Pi (512MB Model B) running Raspbian.