Southwest Airlines is offering passengers the ability to send and receive iMessages from their iOS devices in-flight for $2 per day. In-flight Wi-Fi access for all applications is available for $8 per device per day. It's likely that the airline is opening up iMessage related ports to users who pay the $2, while users who pay more receive access to in-flight email, social networks and the like. The $8 per day service also includes access to 13 live television channels on laptops and iOS devices. Beginning today, Southwest is enabling iMessage for $2 a day! Any Apple user that has iOS 5 or later with the iMessage feature pre-loaded on their device