"All I have to say is that Animal Crossing better support voice chat via the mic or headset port."
No way. That would just lead to SO many annoyances, hinder creative conversation, and completely ruin the illusion the game strives to create.
Leave it all text based, Nintendo, PLEASE!
With the stylus typing in text will be a breeze.
Instant messaging is so popular today people will naturally take to it.
Of course an automatic spell-checker would be a welcome feature.