Official Google Blog – Mining patterns in search data with Google Correlate: “…[Using] Google Correlate, which we’re launching today on Google Labs…you can upload your own data series and see a list of search terms whose popularity best corresponds with that real world trend. In the example below, we uploaded official flu activity data from the U.S. CDC over the last several years and found that people search for terms like [cold or flu] in a similar pattern to actual flu rates. Finding out these correlated terms is how we built Google Flu Trends.