We did it…..Our crawlers collected the 1 millionth keyword from meta tags across the worlds largest websites which run AdSense (i.e Goolge advertisements). Our keen users of the Keyword Suggestion Tool can now enjoy more targeted keywords and have greater reach for their keyword research.
We slightly changed our reporting at http://www.searchforecast.com/user/search_keyword_result.php so you can search on keywords and see the “Frequency” – that is, the number of AdSense websites that used the keyword.
I call this the “wisdom of the crowds” approach to synthesizing keywords -as the publishers running AdSense are generally more knowledgeable about which keywords drive traffic and conversion.