Google is experimenting with even more ad types. The newest announcement involves a whole new type of interactive ads called Google Gadget Ads. Google has already been testing the ads, and the company and observers are quite impressed with the technical capacity of the ads, even going so far as to call them a breakthrough.

Gadget Ads is very far reaching,” said Andrew Frank, an online advertising analyst with market research firm Gartner Inc. “This is the platform that Google is going to build all their cross-media advertising services upon,” he said.

The new advertising service is designed for broad adoption across Google sites, including iGoogle personalized home pages that tens of millions of consumers use for searching and to be notified of updated information on the Web at large. The new format works across Google’s network of hundreds of thousands of affiliated sites and can be embedded in YouTube videos.

The ads use Flash and AJAX and represent a major step forward because they offer interactivity in a sense that is not currently being delivered.