Google is about to release a new Google Latitude App for iOS devices that will let you share your location “continuously” with your friends and family members.
The Google Latitude app supports “background updating” so you can keep sharing your current location even after you have closed the app.
The app is now available for download on the iTunes US store. According to the YouTube video, the Latitude app requires an iPhone 3GS or iPhone 4 with iOS 4 or above though it also works on the iPad.