Hi Would like to tell about our experience about google adsense and adbrite. After 1 year of experiments of ads in search results, confirmation mails & page, header, footer, sidebars, or hiding in content. If a user have a goal with their visit on your site, then your adsense bar do no good, why click on a link out when you are sarching for something. Another example is in a search window among results, it egenerates too few clicks compared to sidebars that it shows that the user is after the result and do not care about my advertisement among the result. When a user is leaving your site and you show him/her a ad, then she/he might click. Or if the users comes to your page and see that this is wrong, then he7she might leave your page through a adsense click. After experience most effective advertisement is advertisement shown to 1. Accidential users. Those who just clicks to your site through a link or search result. eg. adsense in sidebars or header. 2. A user done with your site, leaving for another for today. 3. Adsense among search results. 4. Adsense inside content..