There's a bit of a discussion floating around these days regarding the ability of the iPhone 4 Personal Hotspot to add GPS geolocation data to a Wi-Fi only iPad. This got started with an Urbanape post by blogger Zachary Bir in which he described being able to put his iPhone 4 in Personal Hotspot mode, make a connection to the phone with his original Wi-Fi iPad, and then watch on Google Maps on the iPad as the "blue dot" followed his car precisely on the road.
Some bloggers have been saying that they believe this is just the iPad using the standard Wi-Fi geolocation that's available on laptops and other devices, but I agree with Bir that he's getting true GPS information transferred to the iPad from h
