Marauder's Map in the Digital Age

Google has come out with a digital version of Marauder's Map (last Harry Potter reference, I promise)--a new mobile mapping application called Latitude , that allows users to take advantage of GPS technology to pull up friends' locations whenever they're phones are turned on. The app is bundled in with the newest version of Google Maps and is currently accessible on Android-powered G1 phones, most color BlackBerry's and many Windows Mobile smartphones. According to Cynopsis Digital, it will soon be available for the iPhone and iPod Touch. Location updates made on Latitude are then communicated to Google Talk and Gmail. 

Latitude may feel like a breach of privacy for some, but luckily it's opt-in and users would have to agree to share their location. I don't think I'll be using this application since I'm still using my  Moto Razr V3 (a dwindling species), but more importantly, I'm late alot and when my friends call asking where I am, I almost ALWAYS lie. "I'll be there in 2 minutes" I say, when clearly I'm about 10 minutes away (my friends have even coined a term for this tendency: OST- Oriana Standard Time). It's a habit I'm trying to rid myself of, BUT until I do on my own terms, I wouldn't want this Latitude thingie blowing my cover. If there are alot of people like me, I don't know if this application will take off. But it's pretty cool nonetheless.