Google Latitude just landed on iPhone and as with any location-based app, it's always good to know how to turn it off and maintain your privacy when you so choose. This one can be a little trickier than most since it looks like even quitting the app and rebooting doesn't turn off Latitude tracking.
We don't know if this is some bad coding on Google's part, whether Apple's background location API is supposed to be allowed to do this or not, or if this is just the way Latitude is designed to work (scrary if so!) but it just seems to stay on. In order to turn Latitude's tracking off this is what you need to do:
Google Latitude -- the service that either allows you to keep track of your friends or be stalked by stalking stalker types, depending on your point of view -- is finally available for the iPhone and iPod touch. No, it's not built into Google Maps as part of iPhone 3.1 with push update capability. No, it's not built into Google Mobile app. No, it's not even set up as an iPhone app in and of itself.
Techcrunch reports that during Google's I/O developers conference they showed off the iPhone version of Latitude -- which lets users stalk keep track of their friends via GPS and other location-based services -- but not as part of some revamped Map or Google Mobile application as many suspected: