Google introduced “Search with My Location for iPhone 3.0,” now when you visit www.google.com from Safari on your iPhone 3.0, you can choose to turn on My Location by tapping on the link on the homepage. When you tap on the "update" link, your location’ll be updated and displayed right there on the homepage. Whenever you want to refresh your location, just tap the "update" link. You can also search with My Location using Google Mobile App, available from the iPhone App Store. Note: Google won’t use your location in search unless you explicitly opt in. And you can always disable the feature from Preferences at the bottom of the homepage.