Had a friend bring their Wii over to see how the interaction was with the new http proxy.
With the http proxy running in transparent mode, the Wii is unable to download from the Wii store, we were testing the new Check Mii Out channel.
With proxy enabled, the Wii presented:
Error Code 204038
Please wait a moment and try again.
Clicked try again.
Tried 3 times, did not work.
Now I added the Wii to the Exception list, disabling EVERYTHING. This time it worked, however horribly slow.