I was poking around my iPhone Settings in 3.0 and came across this under 'Mail,Contacts,Calendar">(my main mail account)>MobileMe and at the bottom is a setting for turning on "Find My iPhone" when turned on a dialog come up saying "This enables the "Find My iPhone" service on your MobileMe account at me.com" I looked at MobileMe but this service isn't up yet. I'm guessing this will use IPs to find your lost/stolen phone or at least keep limited track of your kids? If this is old news, sorry. I searched for "find my iphone" and of course lots of lamenting about iTunes not finding it, etc. came up.