Nintendo DS does geopositioning with WiFi

A highly reliable source just sent in this image of a Nintendo DS using WiFi triangulation -- rather than GPS -- for geopositioning data (sorta like that iriver W10 we mentioned back in January). Not sure when this might be commercialized, but it would potentially make it possible to add location-based data to DS games without requiring some sort of GPS add-on. Click on for a full-sized shot.