Chris Kohler of Game|Life interviewed Nintendo of America VP George Harrison about the future of the Wii system, and his responses were, well, generally unsurprising. We wouldn't expect Nintendo to suddenly change their strategy in the midst of such success.
Harrison said that because of the high prices of the Wii's competitors, he expected the Wii to have a lifecycle longer than the traditional five years. (Would that mean more than 35 million installed units in the US?) And it'll continue to have a pack-in for some of that lifecycle, since Wii Sports is a "cultural phenomenon" that is helping to draw people in to the system.
Harrison also mentioned that more Wii software targeted at Nintendo's new "expanded" audience would be revealed at E3, and that a game download channel is in development.
There's more, including some weird comments about localizing Virtual Console games and a response to the continuing shortages. Go read the whole thing, if you are so inclined.