Update: Google has a fascinating research paper available about how it predicts search trends. Some of the key findings from this research are highlighted in this post at Google's Research Blog.
Google has introduced an iGoogle gadget for Insights for Search. It displays the top rising searches and top related searches on your Google home page. Users can change the settings to show results for a specific location, keyword, category, or source.
Google has launched a few new features for Insights for Search, which should make the tool even more useful to marketers than it already was. If you are unfamiliar with the tool, it was launched last summer, and it helps marketers find trends in search so they can be applied to your own marketing campaigns. It was discussed fairly extensively here.
Have you ever checked out Google's Insights for Search? Basically it's a set of tools launched last summer that let you look at trends in search to help you apply them to your own marketing campaigns. "See what the world is search for," as the product's slogan goes.
Another addition to Google provides some extra details about search behavior on the dominant search engine.