The app is built using Esri's ArcGIS API for Microsoft Silverlight and the recently published (free) web API of the World Bank that provides access to up to 50 years of economic, financial and health data.
Besides mastering some technical challenges (missing cross-domain access file, amount of web requests) the map viewer looks sharp and straight forward without the usual template-related overkill of functionality - great job visualizing all this economic data. Let's see which other - maybe analytical? - mapping tools will follow...
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