Thanks for the updated LTDs. 360 & PS3 have been selling neck and neck since the last time we got numbers for them. Wii launch numbers pretty low, but imported Wiis have been sold in Korea since Japanese launch, so installed base will be higher than this. The import Wiis will be tracked as Japanese sales, though. Also, official Korean Wiis are region locked to Korea only.
Sony actually recently put the price of the PS3 up in Korea, but it's true that Microsoft dropped the 360 price. Both moves due to exchange rate movements.