http://www.google.com/latitude/apps http://www.google.com/latitude/apps Turn on Latitude, enable friends alerts in Latitude Apps, and you'll see that the alert

http://www.google.com/latitude/apps http://www.google.com/latitude/apps Turn on Latitude, enable friends alerts in Latitude Apps, and you'll see that the alerts only happen when you go outside of the predicted pattern... meaning that they can already do this if you want them to.