To date, only two ... well, okay, three ... games have utilized voice chat: Metroid Prime: Hunters and Pokemon Diamond/Pearl. It can only be done with those who have exchanged friend codes (wouldn't want to see those crazies, you know), but is it even adequate?
Our experiences with voice chat have been spotty at best. Unless the other user has a new DS headset ... highly unlikely ... the incoming audio can be very difficult to comprehend. Is this a feature you'd like to see implemented in more DS games, or do you think it's not even worth it? Is it even important to the gaming experience in general?