American Civil Liberties Union Freedom Network. Check out this site to get up-to-the-minute reports on the state of civil liberties around the nation. A voice from the left.
http://www.aclu.org

The American Center for Law and Justice provides resources related to religious liberties and the free exercise clause. A voice from the right.
http://www.aclj.org

The Freedom Forum is a nonprofit foundation that promotes journalism and the First Amendment. The forum also sponsors the Newseum, an on-line, interactive museum devoted to First Amendment issues.
http://www.freedomforum.org

The Flag Burning Page confronts the core American values of order versus freedom. The site takes a libertarian approach, neither encouraging nor discouraging flag burning. Its single mission is to prevent any constitutional ban on flag desecration. There is a link to a virtual flag burning, if that is your cup of tea.
http://www.esquilax.com/flag