Google (NSDQ: GOOG) announced a new feature for its AdWords service today, which will enable ads that were once formatted and restricted to the desktop computer to also appear on mobile phones. Historically, it didn’t make sense to deliver desktop ads to the phone because if a consumer clicked on it, they wouldn’t be able to view the page correctly. But now that some phones have full Internet browsers, this is less of a concern. Google said today in a blog post that advertisers will be able to place the same ads on the iPhone and the T-Mobile G1, as well as other phones with full HTML Internet browsers as they become available. This is likely a compelling option for an advertiser since it will allow them to reach mobile users without having to fuss with building separate mobile ad formats.