Richard Heeks (http://is.gd/593mM) has entered the ITU data on mobile phone penetration for all countries from 1998-2008 into a Google Docs spreadsheet, and then added the Motion Chart visualization (the same engine made famous by Hans Rosling and TED). Play with the visualization (http://is.gd/593mg) or check out other World Bank data (http://devdata.worldbank.org/DataVisualizer/).
