I've been working on a label design for the front of the enclosure. This is what I've come up with so far... It lists every Wii Virtual Console game, and it's corresponding LED colour setting. This means when using the adapter, you don't need to remember the mapping setting for every game... it's right on the front of the adapter! Simply match the LED colour with your game, and play. I hope you like it - I think it looks quite cool.
Here it is on the prototype... ignore the extra cables sticking out the side, these are simply for programming and testing the prototype (your one won't have them).