[jyl]

But don't I have a dynamic IP? So every time my router is plugged in, my IP changes? Anyway, how would Google know that IP address X is at physical location Y?

I've heard that Google captured the location of every WiFi network on its Street View war driving routes. How would that work? What information does a wireless network broadcast, and how would that let Google Maps subsequently identify a particular router used to browse Google Maps? If I took this router to Alabama, would Google still think I was in Oregon?