Google Latitude

Hide-n-seek is history, stalking is easier than ever, and the world gets to be a much smaller place thanks to the new Google Latitude feature in Google Maps for mobile. If it's not enough to let your friends and family know how you are, you can now show them where you are. I think it's a very cool feature, and could be very useful/dangerous in some cases. I'll be using it, and I'm sure many of my contacts will also.