We've seen the hardware. Here's a look at the software. Nintendo has brought in Nagoya-based Buffalo Melco Group to create the WiFi connection software. When the WiFi USB peripheral is inserted, the DS is able to go online. Before this happens, a pop-up window appears on both screens, guiding the player through the process and asking for their access point.

Imagine that it's all in English, and the pic will show you how it works.

Company Responsible for the Soft [Melco Inc.]