Just a heads up: NPD numbers for November will be released today between 16:00 and 18:30 eastern USA time (i.e. 6-8 hours from now).
It will be interesting to see how VGChartz and NPD numbers will compare in a month marked by high Black Friday sales and the Toys R US promotion on Wii software. NPD's numbers for Wii software shouldn't be taken as gospel because they're apparently not receiving sales data from TRU anymore.
Here is TheSource's writeup on expectations for the numbers: http://vgchartz.com/news/news.php?id=696
My Mario Kart Wii friend code: 2707-1866-0957