Square Enix has released an augmented reality demo for Bravely Default: Flying Fairy in Japan via the eShop. Ran, a member of the forums was able to get the marker required to play the demo ahead of time (it was meant to be released during the Tokyo Game Show). He also translated the demo, revealing that the story involves an evil force that is tearing down the borders of the world. The main character must travel to a far off land to save the world and become a hero of light.
I have to say, the game looks a lot better than I thought it would and am actually pretty excited to see it localised.