A wifi usb adapter doesn't plug into the Wii, it plugs into your computer. So your computers uses the drivers, then the adapter can act as a WiFi hotspot. "wii drivers" have nothing to do with WiFi adapters, they would matter on a USB - LAN adapter though.
The wii works the same way DS does. It just needs to pick up a wireless connection that you can connect to.that allow it to access the Nintendo Wi-Fi Connection service???