This looks pretty sweet, it sounds like Lijit but through Google with the ability to add adsense links.
**This guest article is written by S. Maheshwaran from My Mind Leaks
Google coop is a customized search engine service. This allows you to build a social-search engine for your blog. Google coop provides you a control panel where you can start creating your own search engine and later collaborate with users to enhance it i.e. Socialize it.