The Nintendo Wi-Fi USB Connector is a small device, slightly larger than a USB flash drive, which creates a wireless access point for your Nintendo DS and Wii systems.
In my opinion, this connector really is not a very good choice for wireless. One of the problems with the connector is that it seems to be rather weak, since my Wii seems to struggle to connect to it. Another problem with it is that it only works with Nintendo systems, and it will not allow any other devices to connect to it. The one thing this connector has going for it is size, and I think that for the price of this connector, you're better off spending a little extra and getting a proper wireless router, especially since the Nintendo connector will ONLY work with Windows XP.