You will need an Android phone running 2.3.6 and to install the Android application. You will also need a 64 bit Linux computer with the discovery plugin. The web app script demo.js shows what regular developers have to write.
This will scan for UPnP devices and invite the user to select which one to use.
If you select the Nexus S running the demo app, a button will appear below inviting you to take a photo using the front facing camera. If the camera is sleeping you will get the last frame it took. You can also make the phone vibrate for one second.