A snippet from the IGN preview...

The questionable option within the menu: you had the ability to turn on and off a suspicious "Use Headphones" switch. On the one hand, it could just be an option to adjust the sound equalizer so you're not blowing out your eardrums. On the other hand, I was thinking that this could be an optional ability to separate and send the voice through optional headphones, but you don't plug headphones into the Wii. If you want personal sound you have to plug into a sound system or directly into the television, so maybe this option sends voice through one audio channel and the in-game sound through the other? It was a feature I couldn't test, but keep your ears peeled.

Could it mean that a headset is coming, or at least being looked at...or does it simply relate to the in-game music? We'll have to wait on that one for now. Also, there is no mention of the Wii Speak/AC:CF bundle in this preview. I've emailed our rep to see if I could get a confirmation of that bundle.

Preview here