Funny how...
Nintendo DS is NOT Wi-Fi certified by the Wi-Fi Alliance.
(Nintendo simply modified slight things and didn't submit the product...presumably for piracy reasons they don't want it fully interoperable until they are ready.. who knows what they are doing... this doesn't mean it doesn't have Wi-Fi though cause it does).
Besides that just looks like a wireless access point for a router with a Nintendo logo.. This doesn't make sense at all... Where does a PC come into play? The DS can get signals straight from a router. This is like saying signal goes from router, to this device, into PC, back out through device to DS? o_O
Or perhaps it's just a device to wirelessly upload junk to a computer... OR more likely...
You plug it into a computer with internet connection (wether direct connection or over a wireless LAN) and this card thing broadcasts it out to the DS (and ONLY this card, not just a router... this explains why Nintendo didn't get the DS Wi-Fi certified... BUT THIS device would have to be wi-fi certified because it has to work with any PC configuration..)
Weird... That would elimated hotspots. It's not like you can go into starbucks and say hey, I gotta plug this into your server!
I was expecting something like a GBA cart (or something plugging into GBA slot) that "unlocks" online play and has online play software and junk.. Then all you need is an unencrypted router...