Actually, if the Nintendo Channel figures are only for "legit Wiis" in Latin America its probably better - we don't really want to track pirated software to make the market that sends money to the publishers look bigger than it is. In terms of the legitimate console and software market, I think the Nintendo Channel represents a Canada like x6 or less sample.
Nintendo had shipped 35.9m Wiis through September 2010.
NPD had 30.3m of them in the USA
I figure there were 2.7m of them in Canada based on 2009 figures.
If every Wii Nintendo had shipped was sold through, there would be 2.9m Wiis in Latin America, which means the Nintendo Channel is at most 1/7 of the users in the market. I really don't think the sample is that small though given the lower DSL / Cable Model rates compared to the USA & Canada. So from that we can play around with the numbers:
2.9m Maximum > Users > 410,000 Latin America Wii Sample (I'm fudging this as I don't have the #s for Sept in LA)
Canada Nintendo Channel to Canadian Wii Users = x6, at that rate Latin America = 2.46m
33m 2.5m = 35.5m? That seems too high still, as Nintendo would likely leave more Wiis than that in stock for the upcoming holiday season, and since internet connectivity is lower than in Canada, particularly away from Mexico's northern states and urban centers where industrialization has made the country rather wealthy.
If we do x4, in lieu of Latin America seeing at least 4x the broadband internet users of Canada, despite lower penetration into the population, you get 33m 1.64m. For the legitimate market, that seems about right. I wouldn't doubt that there are a million or two million more Wiis that are pirated additionally, which would make the sample for Nintendo Channel similar to the USA / Canada for overall Wiis, but larger for non-pirated systems, since pirates will avoid Nintendo's mod-checks. Thats really not bad at all. If there are 800,000 Wiis in Mexico, sold in the Mexican market, and not pirated, the legitimate market is on par with a place like Scandanavia.
At 800,000 for Mexico and you'd probably split it up as:
2006 - 20,000
2007 - 120,000
2008 - 215,000
2009 - 250,000 (i figure the price cut helped more here)
2010 - 195,000
Roughly speaking, the figures for Wii in Mexico / Brazil could be on par with X360 in Japan - not too small. I figure the Brazillian market is probably similar. Maybe a bit bigger or small than Mexico, but with those two splitting the overwhelming majority of Wiis sold in Latin America that aren't pirated or imported.