So is this more or less accurate than location by cell tower? I used to use that as an option in Llama all the time. Didn't require a GPS ping, and once I had trained it sufficiently, it was fairly accurate with minimal background work. Heck, around my work I had problems where I walked around the outside of the building and it figured I wasn't at work anymore. I'd say that's pretty darn accurate. But I know that probably only works for really dense areas with tons of towers to handle tons of phones.

Just feels like it would be more accurate than trusting that SSIDs are completely unique when there's tons of instances where the same SSID is used in multiple locations...