Matt Mohebbi, Software Engineer, writes:
From the post:
In May of this year we launched Google Correlate on Google Labs. This system enables a correlation search between a user-provided time series and millions of time series of Google search traffic. Since our initial launch, we’ve graduated to Google Trends and we’ve seen a number of great applications of Correlate in several domains, including economics (consumer spending, unemployment rate and housing inventory), sociology and meteorology. The correspondence of gas prices and search activity for fuel efficient cars was even briefly discussed in a Fox News presidential debate and NPR recently covered correlations related to political commentators.
Google has added 49 countries for use with Correlate, bring the total to 50.
Just in case you are curious:
What correlations are you going to find? (Bearing in mind that correlation is not causation.)