Its another wicked cool tool from Google. Their insight for search tool lets you see word searches over time and within geographical regions. The search term "emerging church" for example, has been declining in use since its peak in early 2007 and South Africans come out on top as the top users of this term. If you were thinking of naming a project or website, this tool could be handy to figure out how appropriate your name is, especially in relation to their "rising searches" list which is also a handy tool.
Downside in my opinion is the search results point to static web articles, most of which have no comments or feedback for correction or comment. Why not point to some tried and tested blog posts? I am wondering if Google will be pointing to its own Knol pages in the near future and this is a preliminary step.
Here is a map of the regional searches for "emerging church".
Track the Movement 
