Blogs. What does an obscure format which started with computer geeks have to do with development? Quite a bit, say Tim Harford and Pablo Halkyard, who write the Private Sector Development Blog, the World Bank's first venture into internet blogging. Take the words of Financial Times internet expert, David Bowen: 'In the last 12 months they have gone from being an obscure and little understood fringe activity to something we all have to think about, and quite possibly indulge in.' The development community is no exception. Here's how blogging will change both the developed and the developing world.