Google Insights for Search Shows Trends Over Time
Google just released Insights for Search, a new service that lets you enter one or more keywords and compare their popularity and use over time. Search results include geographical information, related news articles, related searches and rising searches.
The service bears a strong resemblance to Google Trends, with some added features such as the ability to distinguish from similar phrases that mean different things, and added a heatmap showing where concentrations of searches came from.