"QuickerTek has released a new MacBook Air power charger, the Auto and Airline Charger."

This seems to take care of all your power supply needs, well except for a wall plug in if you are stuck in the airport. I guess they figure you are going to haul around your regular power supply anyway, but it sure would be the ultimate power supply if it came with a wall outlet option, then I wouldn't mind too much paying the $89.95 USD price.