Square Enix have launched the official Japanese site for the Fabula Nova Crystallis series of Final Fantasy XIII. The site is a portal to all new sites for Final Fantasy XIII, Final Fantasy Versus XIII, and Final Fantasy Agito XIII. I think some of the screenshots on the XIII site are new, but sadly, the Versus XIII site is just an information page.
Fabula Nova Crystallis Final Fantasy XIII Official Portal Site [Square Enix]