If you're a fan of flight/combat sims then check out Kotaku's contest for next weeks release of Ace Combat 6: Fires of Liberation (エースコンバット6 解放への戦火 Ēsu Konbatto Shikkusu Kaihō e no Senka) video game for the Xbox 360. All you have to do is make a "rad" paper airplane and the loot is yours, it includes the game itself, autographed photo (from game's producer and director), faceplates, and a flightstick set. They mentioned cut and glue, so I guess that includes paper crafts/paper models.
Make A Rad Paper Airplane - [Site]