Google Public Data Explorer
http://www.google.com/publicdata/home

​The Google Public Data Explorer makes large datasets easy to explore, visualize and communicate. As the charts and maps animate over time, the changes in the world become easier to understand. You don’t have to be a data expert to navigate between different views, make your own comparisons, and share your findings. This is a Google Labs project, which means it’s work in progress. They are making it available now to gather feedback, but also to get in contact with public data providers who want to try publishing some data on this new platform. This has been added to the tools section of Research Resources Subject Tracer™ Information Blog.