There’s an article over at Technetra demonstrating how to use Sinatra, Ruby and other tools to drive a mobile client like the iPhone, and integrate it with a live data source. The client side is JavaScript and CSS customized for iPhone’s Safari (but playable for testing on a desktop browser like Firefox). The server side is all Ruby and Sinatra. Sinatra sings a simple but complete Web interface tune while core Ruby plays a drum beat with the live data feed – in this case the Bluez D-BUS message stream on Linux. The article is also notable because it’s presents a good example of how to write a module on top of ruby-dbus to monitor Linux’s Bluetooth subsystem.