At the Web Congress in Barcelona, I attended a workshop on Open Data in wich Martín Alvarez Espinar, W3C Spanish Office's head, and Jordi Graells i Costa, coordinator of content and innovation of the Generalitat de Catalunya, explained what is the international initiative Open Data, and how it is developed in concrete projects in some communities of Spain, as Asturias and Catalonia.
In DataprixTV we released two videos of CTIC that summarize very well Open Data's definition. The first explains what is Open Data, and the second shows an application example of Open Data and Linked Data in a Web application that lets you view online INE statistics on equipment and use of IT and electronic commerce in households and Asturian companies.
This is the presentation, what Jordi Graells shared in Slideshare: Open Data from Generalitat
View more presentations from Jordi Graells
I recommend to monitor the Web Open Data @ CTIC , from the CTIC Foundation is updating us on news in Open Data, especially those produced in Spain.
Also important to check the Catálogo de Datos Abiertos (Dades Obertes) de la Generalitat de Catalunya