Unit 9 have this really cool technology to link smart phones with digital outdoor sites, this looks interesting;
'Wi-Fireworks – How it works: we are beaming free wi-fi from our windows. Open a browser on your smart phone. The phone automatically detects our wi-fi as the strongest signal and we redirect the phone to an html5 page optimized for multitouch devices running our game. Whatever you draw on the screen, appears on the windows. Click explode, and watch your doodle explode as a firework. Its not an app. It’s a wi-firework experience in HTML5'