I don't think this will affect the wii overall, but the Nintendo fanboys may take this harder then the rest of the fans of gaming. I never really expected third party games to sell very well on the wii, Nintendo fans have always stood very close to the core games made by Nintendo and i don't think that will change.
But Sony fans are more used to this with the PS2 and PS1, we had 30 games coming out a month at most points and crap games are just something that will happen, i've heard reports of over 2k games for the PS2 and i think that is about right, not too many good games out all of that.
This is nothing to fear and is just part of the wii, most companies see the system selling very well and will try to make some cash fast and they will find out that Nintendo fans will just stick with their own games overall. The wii will have more games overall then Nintendo's past consoles, but nothing like the PS2/PS1.
The wii will stay strong and overcome theses types of game just like they did with the GC.
