Apparently this Japanese site:

http://gmstar.com/gb/ff6.html

has info on FFVI Advance's new features.

Here's some screenshots:

http://uk.videogames.games.yahoo.com...ce-d42a74.html

I'm glad the graphics weren't kerfunkled up. I always worried about that.

Now, here's a translation from a member of CoN:




System optimization, graphics update, new job availability, extra dungeon, etc., 120% port of Final Fantasy VI!

12 Years Since the Original
In 1994, Final Fantasy VI was released on the Super Famicon. A dramatic story was developed with a sculpted group of characters who were all tied firmly into the plot.

Featuring "crystals," which have always been a series motif to this point, this is an ambitious work with a wonderfully presented appearance of a highly technical civilization. It's profound gameplay and dramatic scenarios are invaluable, and this Super Famicom release set a record when over 2,500,000 copies were sold.

Presentation
In the original work, characters learned spells by equipping magicite (lit: magic stones), and were able to summon through the "Magicite System." Each character was able to use a job, and players were able to freely switch characters in and out of their parties for battles.

Also, the game featured "Side Attack" and "Pincer" battles with characters or enemies along both sides of the screen. Furthermore, FF6 offered graphics surpassing anything else seen on the Super Famicom at the time, inlaid minigames to be found everywhere, progressively achieved and displayed events, and a battle system which brought forth various capture techniques by combining characters. Presenting the whole new face of the most popular game of its series, "Final Fantasy VI!"

GBA Additions
New Magicite:
Popular Final Fantasy series characters Gilgamesh and Leviathan can be summoned into battle

Extra Dungeon
Search underneath the earth with thee parties! But a formidable enemy awaits you there...

Monster Gauntlet Floor
Series of battles involving all monsters and bosses fought to this point. Set a new record for the party you've raised!

Reconstruction of Interface for the GBA
Redesigned windows, menus, etc. based on FF4A's construction
Rearranged, 8 Channel Background Music
New character portrait graphics, improved battle music
Newly added Monster compendium, Music Player
So yeah. Sounds great!