About the 13th September conference
The bottom part of
this message posted 4 months ago is still relevant, for major third-parties.
Meaning they will discover huge aspect(s) of the Wii U the same time we do, probably during this conference. To my surprise, they are still left in the mist for important areas of the system to this date.
It could point toward different scenarios:
1) Those aspects (including online plan, the OS, the dashboard, etc.) will be innovative to an extent Nintendo wanted to keep those secrets as long as possible.
2) Nintendo were/are polishing all these points until very recently so they didn't have the time to implement them in the latest SDK, etc.
3) A combination of both (the likely one).
E X C I T E D