We've yet to hear any definitive plans out of Sprint for getting voice flowing over WiMAX-equipped handsets in the States, but it's bound to happen eventually -- and South Korea, one of the torchbearers of the standard with its long-operating WiBro network, is kicking off the party. The Korea Communication Commission has officially ratified a spec for voice over WiBro with service expected to start next year, though there probably wasn't a heck of a lot to ratify since it's essentially the same principle as any other VoIP tech. We're thinking the next challenge is probably getting enough battery juice to yap for longer than five minutes at a time, so yeah, good luck with that, guys.