Nintendo has tied up with McDonald’s to offer free Wi-Fi access for its Nintendo DS portable game system, so that users can play online at the restaurants.  The service is launching in November, through a dedicated website.

Released in November, the Nintendo DS has sold 2.2 million units in U.S, NPD says. Sony’s PSP, available since March, has sold two million. McDonald’s already offers Wi-Fi for a fee in 6,000 restaurants nationwide.

More in-depth details available in this IGN story