Google announced today that it will add an option to AdWords that will let advertisers specifically run search ads on iPhones and G1s.

According to the Google Mobile Blog:

Today, the Google mobile ads team is announcing a new campaign-level option that allows those of you who are AdWords advertisers to show your desktop text and image ads on the iPhone, the T-Mobile G1, and other mobile devices with full (HTML) Internet browsers. The ads can point to desktop landing pages so you don’t need to create mobile landing pages or ads in mobile formats. The ads will have many of the same benefits as our 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 — especially during the holiday season.

Ads have run in Google searches on these devices before because the search page formatting on these devices had spots for sponsored links. But since the launch of the newly formatted Google results page on the iPhone, the option exists to run search and display ads exclusively on these devices. This includes individual campaign management within AdWords and performance reporting that is separate from online campaigns.

Google is clearly trying to get ahead of the curve for advertiser demand in the mobile environment, as mobile search usage continues to grow. Search volume will lead to greater inventory and more attractiveness behind mobile advertising, erstwhile stuck in early adopter stages. It’s still early adopter and in many cases “experimental”. That doesn’t bode well in a recession, but mobile search usage increases can’t be ignored.

Watch the video for the new mobile AdWords targeting here.