They guys at Skate and Annoy found a cool little do-it-yerself project that a guy named Jerbearisapimp9 built that allows him to carry a skateboard around in a briefcase like a proper businessman.
Jerbearisapimp9 makes excuses for his ghetto briefcase, but it adds a certain amount of sophistication to his setup. Everyone should show up at a session with a briefcase if they mean business. Check out the Foldable skateboard, BOA.
This would definitely make airline travel with a skateboard much easier. And think what it would do for our image?
[Link: Instructables via Skate and Annoy]