Google announced Insights for Search yesterday. Think Google Trends but with more information and more useful. Type in some search terms and get the rundown on interest over time based on search volume, regional interest, and related searches. It's geared towards advertisers using AdWords, but it can still be interesting to outsiders.
For example, I put in a search for data + visualization + design + statistics and got the above. Apparently interest for all of those subjects (i.e. FlowingData) is on the decline and India sure loves its data. I'm packing my bags to India as we speak.