I want to get a Wii lan adapter as I don't have wireless.

I saw this here on trademe:
http://www.trademe.co.nz/Gaming/Nintendo-Wii/Accessories/auction-200070531.htm

Looking closely at the picture it seems to be the famous Nintendo Wu brand!!

Looking at google for Nintendo Wu brings up some articles about fakes.

I figure its just an unlicenced clone - would it be ok as not much power goes through the thing? (usb to ethernet) ??