if the demand after holidays period surpasses production, it might persuade nintendo to start thinking about larger production, and if they start producing around 3+ millions/mont starting from second half of next year, it could reach 80 millions by the end of 2009. From there everything is possible.
Only thing that Nintendo will be pretty much reluctant to invest in another production facility, so the demand after holidays should be REALLY big.
Edit: another option would be redesigning the wii (wii Lite :P ) to simplyfy it and to make the production of it faster and cheaper. It would probably allow a nice pricecut and Japanese would go crazy over it (they like their tech in small packages)

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