The 30th Chaos Communication Congress (30C3) is an annual four-day conference on technology, society and utopia. The Congress offers lectures (not online yet) and workshops and various events on a multitude of topics including (but not limited to) information technology and generally a critical-creative attitude towards technology and the discussion about the effects of technological advances on society.
For 30 years, the congress has been organized by the community and appreciates all kinds of participation. You are encouraged to contribute by volunteering, setting up and hosting hands-on and self-organized events with the other components of your assembly or presenting your own projects to fellow hackers. Some basic survival guidelines might come in handy for everything not answered in our 30C3 FAQ. Updated information are covered by the CCC Events Blog or via Twitter (@CCC).
Tickets (For Hamburg): https://events.ccc.de/congress/2013/wiki/Static:Tickets
Archive of call for participation: http://www.securityfocus.com/archive/1/528298/30/0/threaded
ioerror speaking at 29c3