TechCrunch points out that a woman who had her purse snatched got it back through Google Latitude:
You see, in her purse, her phone had Google’s location-based social networking service installed, and it was updating the location of her phone in real-time. So even though the thief hopped in a car, when the girl called her sister, she was able to tell police exactly where the criminal was. They arrested the man and got the girl’s purse back.
It’s worth noting that the woman said she had the service running on her phone “as a joke,” so that she and her sisters could “stalk each other.” And that’s interesting because ever since it launched a few months ago, jokes have abounded about it being a tool for stalking. But at the same time, the program had a user base of over a million users just one week after it launched. People are clearly interested in using location data in social services, but it’s usually only negative connotations that are associated with stories about it. Here’s a positive one, but it still has some negative undertones.