I wish I could help you out here, but I can't find a Wii around here no where, sort of pisses me off. Try out their official site,
www.nintendo.com. It will probley explain on there, how it works. I know for all the arcade games that I play on the 360 I have to pay for them :mad: , I'm sure that you run an ether net cable to the wii, that is how it connects to the net. From there you would download, I don't know if you know but if you want your computer and wii to access the net at the same time you will need a hub/router. But you probley knew that.