provided that Wii is not supply limited, and that hardware raise a bit in Europe due to SSBB, then it's the Wii!!

otherwise the Xbox360!!

but who cares, since the Wii will reach the 40 million before Xbox360 reaches the 25!!
LoL.... :p

I'm thinking the 360.

A quick eyeball of the global weekly sales graph shows that Nintendo is selling an average of 350k Wii systems a week, while Microsoft is selling about 130k 360s a week. The 360 has 590,000 to go to 20M, while the Wii has 1.93M to go to 30M. Dividing that...
Wii: 1930/350=5.5 weeks
360: 590/130=4.5 weeks

Of course, whereas Microsoft's sales have settled into a nice stable line on the graph, Nintendo's weekly sales line looks like it was made by a seismograph that just picked up an earthquake by comparison, so it all comes down to the timing of the Wii's supply spikes. I would say we have a 25% chance of seeing the Wii hit 30M first, a 25% chance of seeing the 360 hit 20M first, and a 50% chance that the two will reach their respective sales milestones on the same week. That's why I'm casting my vote for "same week".

Close call, Wii if no xbox 360 price cuts. 360 needs 1 mil and Wii needs 2 mil but Wii is selling more than double of xbox 360's.

Both will happen at the same time

This isn't a tough choice really, the 360 should hit the marker first. The Wii needs to sell more than ~3.27 units per 1.0 X360 sold and it barely managed 3 to 1 in a relatively strong sales week for the week ending June 21st.

It is possible the Wii could pull it out if a X360 price drop announcement/leak holds up demand for a few weeks but if the drop hits in 5 weeks or less its a lock. With no price drop info at all the 360 is still the clear favorite based on recent trends.

well supposing that both consoles sell the same the next weeks, that would mean the 360 would need 4.75 weeks to make it an the wii would need 5.1 weeks, so i will go with the 360 at this one :P

 You didn't say what you think, i think that if you are going to make a thread like this, you should say what you think first.

The Wii needs to outsell the 360 by more than 3-1
This week it did outsell the 360 by more than 3-1

However, the 360 seems to be getting a price cut, and the Wii gets an 'others' release of brawl, who knows what'll happen

Edit: I Can't do maths

X360 for one week