I respectfully disagree. For what it's worth: The entire yahoo should focus on building a better advertising system than google. I believe they have the tools

I respectfully disagree. For what it's worth: The entire yahoo should focus on building a better advertising system than google. I believe they have the tools to do it. Google pushes ads to you by crawling your site and determining what ads should be displayed. What I want, and I believe others would too, is a method of pulling ads to your site completely programmatically. To do this, we would need to be able to classify links, and this is where the power of tagging comes in. My four steps: 1. Programmatic "pull" advertising retrieval with complete control. 2. Dynamic ads for single-page applications. 3. Integrate delicious into yahoo itself (e.g. have "tag this" buttons for each search result, and show tag clouds/related tags in search). Make these tags easily obtainable in real time for any website that wants it, which would be required for the "pull" model to work. 4. Integrate flickr into yahoo for the same reasons. Advertisers will switch, because even as lower rates are on yahoo currently, you will have greater contextual ads and greater results with site visitors. You know your site better than google! Advertisers want to be working on a mixed model. Google provides a push advertising model. Yahoo could provide a mixed model, providing push + pull at the sites discretion. I believe if they do this they could take back the lead. And, they have a unique advantage at the moment: delicious and flickr.