Google July 29 introduced AdWords location extensions that let advertisers put their business' location and phone number on a Google Map ad for mobile Websites and applications. The maps ads will render on phones with full HTML browsers, such as Apple's iPhone or the Motorola Droid X. - Google is looking to target ads to smartphone users who often use Google Maps to get directions and find businesses. The company July 29 introduced new AdWords location extensions that let advertisers put their business' location and phone number on an expandable map ad for mobile Websites an...