Android : http://titaniumes.com/2011/09/17/como-anadir-admob-en-una-aplicacion-titanium-android/
IOS: http://www.johnbarnard.info/2011/mar/28/admob-on-titanium-appcelerator-for-iphone/
http://developer.appcelerator.com/question/117942/admob-module-installation