One could easily make the case that all is rosy in the Open Data world. The number of open data initiatives has grown from two to over 300 in just four years, whilst the most notable initiative to open up governments worldwide, the Open Government Partnership (OGP), has seen membership rocket from eight to 59 countries in under two years. Over a million datasets have now been released by governments around the world, spawning new businesses and fascinating social projects such as Openspending.org. In recent months, we have seen the Open Data movement being linked to the Big Data one withcorporations being asked to open their datasets for social good. This is impressive progress by anyone’s standards – particularly for a subject that was the preserve of just a few geeks as recently as 2009.