Opt-Out
"Are you tired of getting all that junk mail? Telephone calls during dinner? If you are, this site is for you." Part of the Center for Democracy and Technology. http://opt-out.cdt.org/
Opt-in News
The opt-in industry trade publication. Magazine focuses on permission-based email marketing with in-depth articles, interviews, and news on retention, marketing, and content. http://www.optinnews.com/