The Energon Pub

I don't think I've mentioned this before, but I've thinking that the DS could be used as a video phone. In Japan, there are devices that let you use as an internet browser and MP3 player. Still waiting for them to come over here. So I was wondering, it has a microphone and speakers. All you would need is a little camera attachment. But then ofcourse there's the question of how the service would operate. Who would carry it? Would it be free?