Greenwald's speech was great, but so far the most interesting one to me has been Jacob Appelbaum's speech where he gives a lot more technical details (including new information) about how the NSA is hacking systems and how far they are willing to go, like wanting to create a "Great Firewall of Earth" or even radiating people with up to 1KW in order to get what's in their computer, which just proves how out of control and power hungry the NSA is and how indefensible their actions are, despite what some of the NSA HN users around here or their supporters might say.
Highly recommend it: