Team Your Mom has succeeded in gathering enough funds to purchase the wii for the test. That test has a very high probability to succeed.
Apparently on another forum, someone already did the same.
Unless some chinese company starts to manufacture and sell the connectors, they aren't available on the market at the moment.
So, the only source for those parts is getting them from another wii mobo. Even with the connectors installed, the newer wii's are still having a dvd drive that doesn't like gc discs.
There seems to be a new dios mios thread started. If history will repeat itself, some members will ask for a serious donation ground before they will be motivated to make it public. (I won't say work on it, since a demo video should be the prove that most of the work is done and the thing is working) The product that will be released will be buggy as hell, and more donations will be (asked) appreciated to continue the work to make it better. The usb support in dios mios will not directly mean that the wii remote and classic controller will become usable as well. This requires a functional bluetooth stack on top of the usb one. Since dios mios is running in gamecube mode, you can't use an ios to do the job for you. Even without looking any deeper into it, it looks like a dificult and serious amount of work.
Devolution on the other hand, is still running on a normal ios in wii mode (From the pieces I read here), so it should be easier to implement code to use the wiimote. Don't get me wrong, easier doesn't mean easy.
So far what my crystal globe is teling me about the future of gc backup playing on the wii. I hope to stop the off topics this way and expect some responses of angry members which disagree. So, the topic will become a devolution speculation thread again...If not, it was fun writing.