The data includes all searches from those users for a three month period this year, as well as whether they clicked on a result, what that result was and where it appeared on the result page. It’s a 439 MB compressed download, expanded to just over 2 gigs.
AOL claims that none of the data is "personally identifiable" since the user names were replaced with ID #s. However, the search queries contain names, street addresses, telephone #s, and even credit card #s and social security #s!

TechCrunch article:
http://www.techcrunch.com/2006/08/06/aol-prou...arch-data/
Story on Slashdot:
http://yro.slashdot.org/article.pl?sid=06/08/07/2022244

some excerpts:

17556639 how to kill your wife
17556639 how to kill your wife
17556639 wife killer
17556639 how to kill a wife
17556639 poop
17556639 dead people
17556639 pictures of dead people
17556639 killed people
17556639 dead pictures
17556639 dead pictures
17556639 dead pictures
17556639 murder photo
17556639 steak and cheese
17556639 photo of death
17556639 photo of death
17556639 death
17556639 dead people photos
17556639 photo of dead people
17556639 www.murderdpeople.com
17556639 decapatated photos
17556639 decapatated photos
17556639 car crashes
17556639 car crashes

2652898 my space.com (about 100 times)
2652898 different ways to jerk of
2652898 how to not ejaculate so early
2652898 my penis has a big erection
2652898 free videos of big dicks