Singapore's government map: http://www.onemap.sg/index.html and Tunisia's government data site: http://dataviz.fhimt.com/ are both excellent examples of governments creating excellent tools for public use.
SMS for life campaign by Novartis is an interesting example to look at. They reached the most remote areas of Africa to deliver anti-malaria drugs. Their solution used mobile phones: http://malaria.novartis.com/innovation/sms-for-life/index.shtml
I think this is a great brief, but wonder whether different solutions are needed for different countries, or whether one idea can be reached and then adapted. I am a student at business school and during my international political analysis class we are learning different frameworks for understanding how countries are organised. In terms of decision making, for instance, we split countries in to Pluralist (where governments are largely influenced through lobbying), Statist (where decisions are often in the hands of few decision makers at the top of government and therefore quick decisions can be made) and Corporatist (where decisions are more consensus orientated and associations traditionally need to get involved before decisions in government are made). This might be a useful framework once a solution is reached and when you are looking to implement it globally. Further to the implementation consideration, it might be worth grouping countries by those which are bureaucratic (ie. Scandinavia) and those which are relationship based (S.Europe, most of Asia) as this will affect the speed with which changes to the electoral system are implemented. Is this relevant do you think?