How cool is www.google.com/flutrends? OK, maybe it's not the most robust site you've run across. But gee, the innovative principles behind it just grab me. Here's the deal: Google tracks flu-related search requests by geography. Based on the empirically-supported theory that there is a high correlation between these requests and actual cases of flu, the site then reports which states are having the highest incidences at any given time.
Now I'm guessing that back in the early days of search no one would have anticipated this application. It's certainly not mainstream. But it is part of this inexorable march of data, tying together various sources, making us better informed, often in real time. Cool, but getting kind of scary.
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