Sooo, back on topic... I've been following this thread for a bit now and have found it pretty interesting besides the distraction 2 pages ago.
I did some work on the Wii early on with a USB loader, but haven't touched code on it for a while. The nice thing for me is that the CPU architecture is the same as a 'system' that I do spend a good amount of time working with doing assembly level coding... As far as the linux side goes I'm quite comfortable compiling a kernel and such, kinda look forward to the challenge of getting one to boot properly with the modifications on the Wii-U honestly.
Not sure how to jump in and help, or if there's a group that is setup working together on it. If I could offer what little free time I've got and had any needed skills, I'd be happy to help. Honestly I probably just need to gather up some code that's been listed in the thread and stare at it for a little bit, get an idea of where the project is at and where it needs to end up. If someone wants to contact me and let me know how to get in the loop, please do as I'd be happy to help wherever I can!