Dream2be

Google has developed a latest tracking technology named Latitude, which let's cell phone users share their precise location with specified users.

"What time are you going to be home? Have you left work yet? Is your wife at the restaurant that you're going to meet at? Those are very common questions every day and this is a great tool to let someone know, are you late? And so you can be more efficient with your time and maybe ease some friction in social interaction with people," said Steve Lee, Google Product Manager.

There's also an iGoogle gadget for those with an unsupported device (like currently, the iPhone). Naturally this service is totally opt-in.

You sign in with your Google account and invite friends to Latitude from your contacts or through email. Latitude integrates Google Talk, and you can also call, SMS, IM, or email each other from within the app.

You can access new app with the Latitude feature from:
• On your mobile phone: visit google.com/latitude from your phone's mobile browser to download Google Maps for mobile with Latitude. As I said, no iPhone support yet (it's probably stuck in the draconian App Store approval process) but they currently support Android, Blackberry, Symbian S60, and Windows Mobile.
• On your PC: go to http://google.com/latitude from your browser and add the Latitude gadget to your iGoogle homepage. If you've installed Google Gears or if you're using Google Chrome, you can choose to automatically share your location from your laptop or desktop computer.