I was approched by FlatscreenAdz during their startup and was hired to design and develop all their IT needs: from basics such as web and email service, to the actual implementation of remotely adminstering their fleet of flatscreen TVs.
The FlatscreenAdz screens are attached to Unix clients showing the required content on the screens. These clients in turn connect to a central unix server via GSM to collect new content to play and report any issues they may be having.
A web based front-end allows the FlatscreenAdz service crew to remotely administer and update their 80+ screens without leaving their office.
Company Website: Link