wii u has already been exploited, somehow: http://www.gamesradar.com/wii-u-acciden ... ersehacked
Nintendo says it's been a mock-up, i don't know since i'm not really into this, just wanted to share it

Edit: Just tought: it could also be a plan of nintendo, to create such a mock up, to hipe the wii-u for everybody how want's to run homebrew...
Why don't they learn and just create an api for everybody for their console... hacker thinking != commerical thinking ^^