Apparement on peut se connecter jusqu´ a 5 personnes :
The Nintendo Wi-Fi USB Connector can be used to connect online with the Nintendo DS if you do not have a wireless network in your home, or are unable to connect to the Nintendo DS with your current wireless network. Multiple Nintendo DS systems can be registered to the USB Connector and up to 5 can enjoy online game play at the same time.
The Nintendo Wi-Fi USB Connector is for use with the Nintendo DS only. It will not work with other wireless devices. In order to use the USB connector, you will need:
* PC (The Nintendo Wi-Fi USB Connector is not Macintosh compatible)
* Windows XP
* A high-speed internet connection (such as DSL or cable)
* A Wi-Fi compatible Nintendo DS game
nintendowifi.com