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 friends’ medical ailments and loves her three dogs. “Those are my searches,” she said, after a reporter read part of the list to her.