NJ5 on 05 December 2007
According to y-koron's data, it will end up as:
Wii: 640.6k
360: 353.6k
PS3: 353.2k
I put in the extra decimal place for you to see how close PS3 and 360 are :)
My Mario Kart Wii friend code: 2707-1866-0957