Hey, maybe the best, longstanding conference on technology and freedom is Computers, Freedom and Privacy. I've been to one, probably should go to this.
Here's a little more from them:
For over a decade, the Computers, Freedom & Privacy Conference has played a major role in the public debate on the future of privacy and freedom in the online world. The CFP audience is as diverse as the Net itself, with attendees not only from government, business, education, and non-profits, but also from the community of computer professionals, hackers, crackers and engineers who work the code of cyberspace. The themes have been broad and forward-looking. CFP explores what will be. It is the place where the future is mapped.
CFP2004 will explore the most important issues facing the Internet and freedom, including: the role of technology in providing national security and preserving individual privacy and freedom in the post-9-11 world; the impact of new legal and technical developments on the Internet's utility as a medium for disseminating and archiving information, interacting with individuals, and culture; the role of computer and telecommunications technologies in the political process, and much, much more.