For those who want to automatically update their whereabouts using the iPhone’s GPS, there is now a utility that can run on an external server to log your movements. Tyler Hall, a Yahoo programmer by day, has developed some code called Sosumi that pulls the Locate My iPhone information on a regular basis (5 minutes in this case) and can update a service like Yahoo’s Fire Eagle. The code also allows you to send warnings and messages to the iPhone using the MobileMe commands.
While this is definitely cool and would be even cooler with an Apple sanctioned API, there are the obvious security issues. In fact, this application’s existence means that one must only have your MobileMe username and password and some intermediate coding skills to track your iPhone’s (and your) position. Though frankly, if you have that information, you can simply log into MobileMe and do repeated "Find My iPhones" until you find your beautiful stalkee.