Speaking with SpikeTV's Game Head Show he said:
"The multiplayer is coming. During the Japanese launch, there is Pokémon Battle Revolution, and that's really the first one. There will be titles that we'll be announcing in first quarter 2007, that'll be multiplayer-enabled. So during second quarter 2007, people will be able to have a multiplayer experience on Wii."
Fils-Aime went on to talk about Wii Channels and announced that there were plenty more in development but didn't give away any details on exactly what we could expect.
Fingers crossed for an online Mario Kart game.