Here are links to xLobby xPad system showing system diagrams and device integration.
xPad Control Description: http://xlobby.com/news/2010/10/28/xlobby-v3-update-new-dynamic-html-webserver-available-soon/
xPad Control Diagram: http://xlobby.com/news/wp-content/uploads/2010/10/xLobby-Web-based-Layout-with-Ipads.jpg
xLobby xPad Interface Diagrams: http://xlobby.com/news/2011/01/25/xlobby-xpad-interface-diagram/
xLobby xPad External Control System: http://xlobby.com/news/2011/02/07/xlobby-xpad-external-control-system/
xLobby xPad Universal Remote Control System (Ipad, Android): http://xlobby.com/news/2011/04/13/xlobby-universal-remote-control-system-ipad-android/