Square Enix has added a bit more functionality to their
official Final Fantasy IV DS website.
Along with a new movie debuted at the Tokyo Game Show in late September, the site also notes an official release date set at December 20 in Japan, and a starting price of 5,695 yen (about $50). A robust (and growing!) character bio section is available on the site, too, including in-game models for each of the characters.
Furthermore, underneath the "Spec" section of the flash site, Square Enix notes a full cast list for all the main characters of the game, leading to speculation that the upcoming DS remake of FFIV will include voice acting.