Kingdom Hearts creator Tetsuya Nomura might consider a Wii edition of Kingdom Hearts, after he's finished work on current projects.
Speaking with Nintendo Power on the possibility of a game on Wii, he said;
"it won't be a side story, but an authentic addition"-Tetsuya Nomura
He also revealed one of the reasons Square Enix produced part of the Kingdom Hearts story on DS is due to Nintendo. Nintendo actually approached Square Enix and proposed a Kingdom Hearts portable game.
He also explained the significance of "358/2 Days" - It's the passing of 358 days for two different people, although Nomura-san said wanted fans to imagine its meaning in different ways.