I did read the user's guide, which says:
However, Google Maps can show where I am even when I have Location Services turned off. How?Location Services allows applications such as Maps and Camera to gather and use
data indicating your location. Location Services does not correlate the data it collects
with your personally identifiable information. Your approximate location is determined
using available information from cellular network data, local Wi-Fi networks (if you
have Wi-Fi turned on), and GPS (if you have an iPhone 3G).
It's been a couple of days since I turned it off. No applications, including Camera and Maps, have asked me to turn it back on. Is that normal?You can turn Location Services off if you don’t want to use this feature. If you turn
Location Services off, you’ll be prompted to turn it back on again the next time an
application tries to use this feature.