I've been to WarioWorld (I lived in WarioWorld at my previous job ).

We can't become an approved developer until we (or one of our clients) has a Wii project. 3DGameStudio is middleware. The toolset itself isn't going to run on the Wii (although it would be cool if it could).

If you become an approved developer, then you can hire us as your middleware provider. So, back to the three steps:

1) Make your game on the PC.
2) Get Nintendo to approve it.
3) Hire Conitec to port your game.

Conitec's Free Resources:
User Magazine || Docs and Tutorials || WIKI