I track hits on my blog as well as my client sites on a regular basis. And that tracking data includes what search engine terms people follow in order to get to a particular web page.
But now, Google has taken search engine tracking to a new level, extrapolating influenza outbreaks by location, based on searches for flu symptoms.

May 14, 2009
Thank you WordPress
Just wanted to say thanks for still being up even though Google is down. I am really glad I host my site here instead of through Blogger right about now. Check out all the complaints at http://twitter.com/#search?q=google
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Tags: Blogger, Google, hosting, wordpress