This is not new news but I wanted to demonstrate how Google AdWords tailors ads based on your past searches, since it has been coming up more often in the forums.
I conducted a search for basketball shoes and the ads were for Eastbay.com, Nike.com, Finishline.com, Final-Score.com, and so on, all with titles targeting my search (here is a picture of those results). Right after that search, I decided to search for "searching for love" based on our Valentines Day theme. What came up? Three ads, one from eHarmony.com with the title "Look For Local Singles," then an ad for Like.com/Shoes with the title "Basketball love shoes." Here is a screen capture of that ad, to see a full search results screen capture, click here.
This clearly demonstrates how Google is using past searches to help generate related ads for your next search. Basketball shoes doesn't seem related to searching for love, unless you really love basketball shoes. But this demonstrates what Google is and has been experimenting with for a while now.
I first covered this at back in April 2007 but this is the first time I am showing you a clear cut example of it in action.
Forum discussion at WebmasterWorld.