Just came across this on the Nintendo website. I'm not sure if it's been mentioned here yet.
http://www.nintendo.com/wiiu/built-in-software/browser-specs/extended-functionality/
It looks like Nintendo has some javascript documentation publicly available for using the Wii U Gamepad and other features with the Wii U's built-in web browser. A test page is also included for use with the gamepad.
Does our gamepad plugin work with this already? If not, maybe Ashley could add it or someone could make an unofficial Wii U Gamepad plugin.
If nobody here is able to work on it, maybe it's time I brush up on some javascript.
What do you think?