AOL's Search Data Released

I'm pretty sure that this wasn't meant to get released to the general public, but some of AOL's search data ended up out on the internet and provides for some disturbing reading. Although the users are identified only by a unique number, rather than the user name or actual name, it still means you can view their search history over a period of time, and with reasonable accuracy predict what's going on in their lives.

CNet has a pretty good article, including some examples of deduction from search queries. It definitely makes for interesting reading.

AOL's disturbing glimpse into users' lives | CNET News.com