For another article I wrote on some deceptive content in my adsense units I took the following screen dump
I think this is great work by someone at Google and would love to meet whoever is responsible and learn from them. This ad is perfectly contextual and in the moment. I bet it has amazing response rates and probably drove a lot of growth for their webmaster tools. Also in general it reminds me of a great point from Andy Beal… people who visit your site via “allinurl:” or “site:” are probably webmasters and most likely competitors.
That data is useful :)