It seems that Square Enix have been doing a little updating upon the official website for Final Fantasy XIII.
It is now a complete flash site integrated with scrolling images, which come in high quality upon the main page, a separate character page which unfortunately only lists Lightning, Snow and Vanille, but contains HQ CG Character models along with HQ screenshots, some old and some new.

And to top it all of, its all accompanied by some beautiful background music which has not yet to have been heard until now.

You can visit the site here: Square Enix: Final Fantasy XIII Official Page

On a side note, Square Enix have also launched Final Fantasy Versus & Agito sites, which can be viewed below.
Final Fantasy Versus XIII Official Page
Final Fantasy XIII Agito Official Page

Many thanks to Shuyu for informing us on the update.