i think the ps3 and the 360 versions will sell about = on their first week

Tough call but given that COD4 really made some huge brandname. Thus the PS360 version should sell well. But on the opposite side, the Wii version is entering a very unsaturated shooter and online game market where if decently advertised could have a good opener as well. Not as big due to brandname appeal not as high on the Wii platform, but still decent. So here's my sales predictions which are simply guesses at this time. Better to think of the ratios between versions I suppose for opening week:

360- 800k
PS3- 500k
Wii- 350k

Shouldn't this be in sales?
I think the game's sales are going to be lower than Call of Duty 4's as not as many people are hyping it.

360 - 900K

PS3 - 700K

Wii - 350K