Mr Reaper has released a new version of his Visual Controller Test for the Nintendo Wii, heres the release details:

If you like pressing buttons, then this app is for you!!!
I have a flaky Gamecube controller and I wanted an easy way to test it. I didn't really like the other Gamecube controller testing homebrew I found, because it was all text-based, so I decided to make my own.
I haven't messed with making Wii Homebrew in such a long time, but I threw this Visual Controller Test together in a day.
But then I was in a coding mood, so I added in every other peripheral I own.
Maybe others will also find this useful.

More Info here