Today, the Google mobile ads team has announced a new option that allows those of us who are AdWords advertisers to your desktop text and image ads on the T-Mobile G1, or any device that has a full HTML browser. These adds will have many of the same benefits as the standard mobile ads, such as the delivery of mobile-specific calls-to-action and reaching mobile users that are searching with their phones more than ever.
You may have seen these ads running on the G1 already because Google Search on this device results pages that are modified specifically for this phone. Now advertisers will be able to have ads exclusively on the mobile devices of their choice, create campaigns for them, and get separate performance reporting. The good news is you can opt out of these ads and they will only appear on your computer.
To disable these ads that target your phone just go to your campaign settings tab in your AdWords account. Navigate to Networks and Bidding and find Device Platform and select "iPhones and other mobile devices with full internet browsers." Note that if you are currently running Google’s mobile ads, this new option for desktop ads will not affect your campaign.