World bank open data master class

http://geocommons.com/

http://maps.worldbank.org/

http://censusprofiler.org/

http://www.arcgis.com/about/index.html

http://www-958.ibm.com/software/data/cognos/manyeyes/

http://getthedata.org/

http://www.whatdotheyknow.com/

http://code.google.com/p/google-refine/

Google Refine Blog: Progress on Generic Reconciliation Support: Gridworks 1.1 provides a feature for reconciling cells in a data set to topics on Freebase  (e.g., matching "Tom Hanks" to the topic identif...