Alright time for some bragging rights. Will update the OP at another time because it is 3 in the morning but after "week 3" or week ending December 26, 2009, the game's current sales at 8.20 million. Once again sales are in the highest part of my range. On another note, in 6 weeks sales time the game has not only surpassed MW2 360 in the same timeframe but Grand Theft Auto: San Andreas on the PS2 as well. Can check that out with this chart:
http://vgchartz.com/swlaunch.php?reg1=All&game1=New+Super+Mario+Bros.+Wii+-+Wii[35076]®2=All&game2=Grand+Theft+Auto%3A+San+Andreas+-+PS2[3427]®3=All&game3=Call+of+Duty%3A+Modern+Warfare+2+-+X360[28848]&weeks=15
That means in that timeframe this is the fastest selling game EVER. How long can it maintain that... well will easily continue to outperform MW2 on the 360 but GTA: SA is about to hit a holiday season on its chart. But goal for NSMB Wii of course would be to hit 10 million within 9 weeks to break that record, held by GTA: SA.
Other goals for NSMB Wii of course is the 9 million I said as a possibility. Would need to sell 800,000 in "week 4" or the week ending January 2, 2010 the last week of 2009. The Source has stated preliminary numbers in Japan to be at about 200k (shortages) so it would need to do 600k between the E/O and Americas... very doable. Also game is looking to pass up MW2 360 WW before the end of the year which it would need to outsell the game by 200k in that week (probably just accomplished that in Japan alone).
Game has definitely been just as big as I expected it with even a little higher range. Seems that at the end of the year sales will end up at about 8.8-9.0 million which is just amazing for 7 weeks of sales. Despite being one of the last games to release in the decade, it has just asserted itself as one of the biggest, if not the biggest in the decade when you look at it's sales.