I've hooked up our Wii to the LAN adapter (it's on the ragged edge of our wifi network and I had conduit run through all the walls so snaking a cat-5 to the router was a 5 minute job).
The adapter works just fine but I ran a speed test on it and it seems to be speed limited. Any other device connected to the router downloads at about 10 mps but the Wii seems to be limited to 4. Is that a limit to the adapter or the unit?
Meddle not in the affairs of dragons.
Remember, you are crunchy and taste good with ketchup.