I would also like to see dual wielding put into the game, mainly because I prefer playing rogue style characters, but I am unsure as to how it would work with the gameplay style they have at the moment.
Each weapon costs a certain amount of AP to use, so if you have 9 AP and use a sword and a shield and the sword costs 3 AP to use, then if you don't move you can attack 3 times. If you have 2 swords equipped, then you would still only be able to attack 3 times.
I suppose they could add something like a dual-wielding skill that reduces the amount of AP weapons cost to use if you have 2 equipped...