Hi Vgchartz!
The following image is made by expanding the current found in "compare consoles".
Thie comparing i am making does not take into account:
- Big game releases
- Holydays or other event
But it does give a good graphical view of when the wii supposibly takes over xbox 360:
As the image shows - wii is very likely to surpass xbox 360 in october.
(better and higher resolution of the image can be found here)