The Open Knowledge Foundation Blog has announced a call for proposals for OkCon 2010. The conference is scheduled London for April 24, 2010. From the post:
This is a time of great change. In addition to high profile initiatives such as Wikipedia, OpenStreetMap and the Human Genome Project, there is enormous growth among open knowledge projects and communities at all levels. Moreover, in the last year, governments across the world have begun opening up huge amounts of their data.