Hi IAmA! We are core members of the Tor Project. Ask us anything!
The Tor Project develops and maintains the Tor, a software that allows users to browse the web anonymously and securely. Tor was originally developed for the purpose of protecting government communications. Today, it is used by a wide variety of people for different purposes. An estimated 500,000 people use Tor on a daily basis; some use Tor to keep websites from tracking them and their family members, some use Tor to research sensitive topics, and some use Tor to connect to news sites and instant messaging services when these are blocked by their local Internet providers.
Karen Reilly (puffin_net) is the Development Director at The Tor Project, responsible for fundraising, advocacy, general marketing, and policy outreach programs for Tor.
Runa A. Sandvik (runasand) is a developer and researcher working on a range of different projects, from blocking analysis and quality assurance, to outreach and support.
Karen and I will be answering all your questions throughout the day, so feel free to ask us anything you'd like relating to Tor and the Tor Project.
edit: People currently answering questions, in addition to Karen and myself, are Roger Dingledine (arma-tor), Nick Mathewson (nickm_tor), Jacob Appelbaum (ioerror), and Erinn Clark (sakhalin).
edit: I have attempted to summarize some of the most popular questions/answers and collect all this useful info in one place.