Sharing a tool that will assist bloggers in deciding which contextual ad network works best for their website.

This tool can indeed help you compare the relevance of Contextual Advertising services offered by Google Adsense, the Yahoo Publisher Network (YPN) and the Chitika eMiniMalls.

To access the tool, you can either download a Firefox extension or IE addon here
http://labnol.blogspot.com/2005/12/yahoo-ypn-chitika-adsense-preview-tool.html

The direct link to the tool is googleadspreview.blogspot.com