Follow these steps to properly configure your Titanium application to use C2DM as the transport for Urban Airship push notifications.
NOTE
You will not need to make the changes to the AndroidManifest.xml that you see in the setup guide. This will be done for you automatically during the application build process.
Sign up for a C2DM account here http://code.google.com/android/c2dm/signup.html
You need a C2DM Authorization Token to put into the settings of your application.
Set the Urban Airship options in your airshipconfig.properties file to use the C2DM transport.
transport = c2dm c2dmSender = username@gmail.com