Also to note, Nintendo doesn't manufacturer the Wii itself nor any of the components.

If the Wi-Fi ship supplier is operating at maximum capacity (which they are by the way) then it's impossible to make any more Wii's than the current rate.

Same goes for all other components and supply vendors are at capacity. Analog Devices makes the accelerometers for the Wii-mote and is making 3 times more chips than they ever have. STMicroelectronics provides the accelerometer for the nun-chuck and they've had to build a whole new building just for that product alone.

The actual Wii's themselves are assembled by Foxconn (they also build X360's and PS3's) and they are operating at max capacity 24/7.

All this must be taken into consideration when discussing an increase in production.

@Viper1

Thanks for the information, and your points are precisely what I have wanted to say. There is only so much available capacity, and it's divided between a whole lot of companies so it might simple be a case of not enough free capacity. And as you pointed out, component capacity limits cause an absolute limit to the number of manufactured units, especially so with key components such as the accelometers, CPU's and GPU's. And, as surprising as it may sound, even a commonplace component as a Wi-Fi -chip. Most alternate components have slightly different specs and can't be thrown in at a whim, so you're pretty much stuck with what you decide at design time, barring design changes.