International Open Data Hackathon

What is it?

"It’s a gathering of citizens in cities around the world to write applications, liberatedata, create visualizations and publish analyses using open public data to show support for and encourage the adoption open data policies by the world's local, regional and national governments."
When?
03rd of December 2011

How/Where can i participate?
http://www.opendataday.org/wiki/City_Events_2011

In Germany: Berlin, Frankfurt am Main

http://www.opendataday.org/