Once this weeks numbers come out the Wii will have passed 3.5 million on VGChartz. Gamecube sits around 4 million (4,023,235 to be exact). The Wii's sales in Japan have fluxuated greatly with the supply being diverted and post holiday, but is still leading current gen consoles by a wide margin. At around 50k (from other sources Wii would take under 11 weeks to pass Gamecube, but that sales rate changes with what Nintendo ships and produces.
What week do you think Wii will pass Gamecube?
Aug 26
Sep 02
Sep 09
Sep 16
Sep 23
Sep 30 - 1 -Superchunk
Oct 07 - 1 - Steven787
Oct 14 - 2 - Neos, Robjoh
Oct 21 - 2 - Koffieboon, Ishy
Oct 28 - 1 - Freestyler
Nov 04
Nov 11
Nov 18
Nov 25
Dec 01
Dec 08
Dec 15
Dec 22
Dec 29
Beyond...
I would cite regulation, but I know you will simply ignore it.