I pointed to the AOL data release in a previous post. The New York Times uses it to track down a one of the searchers and discusses the problems with such data. Worth a read.
It did not take much investigating to follow that data trail to Thelma Arnold, a 62-year-old widow who lives in Lilburn, Ga., frequently researches her friendsÃ¢â‚¬â„¢ medical ailments and loves her three dogs. Ã¢â‚¬Å“Those are my searches,Ã¢â‚¬Â she said, after a reporter read part of the list to her.