I am curious, how precise can ipad locate you just with Wi-Fi. And how it works anyway. I know there is a base of known Wi-Fi hot spots, and then there are IP vendors with known locations, but beyond that ... When I first took that device to my home, it positioned me about 150 meters away, from my current position (using maps), but when I upgraded to 5.0 beta it pins me up just about 40 meters... Your experience?