Are Wii SDK & Middleware tools good enough ??

[Bodhesatva]

twesterm said:
A good deal of studios use their own in house engines anyways and they can generally work with all three (and handhelds in most cases).

True, but why not help people out more anyway? This is like arguing: "Well, most people wouldn't use it anyway, so its not worth it." Even if it only helps a portion of developers, it's still a good thing. 

It would be a smart for Nintendo to continue to capitalize, as much as possible, on their advantage in terms of development costs. Keep pruning those costs down to bring in more developers.