Nintendo DS is finally getting a Final Fantasy title! It is a remake of Final Fantasy 3 which was never released in the US. The game is coming with an upgraded graphics engine which looks eerily similar to the Gamecube's only Final Fantasy title, Final Fantasy: Crystal Chronicles.
Gamersdaily has some great side by side screen shots from the original NES game and the new DS version.
Update: 14 Oct, 2007 - Edited post and corrected labels.