PostSecret is an ongoing community mail art project, created by Frank Warren, in which people mail their secrets anonymously on one side of a homemade postcard. Select secrets are then posted on the PostSecret website, or used for PostSecret's books or museum exhibits.
The simple concept of the project was that completely anonymous people decorate a postcard and portray a secret that they had never previously revealed. No restrictions are made on the content of the secret; only that it must be completely truthful and must never have been spoken before. Entries range from admissions of sexual misconduct and criminal activity to confessions of secret desires, embarrassing habits, hopes and dreams.
Since Frank Warren created the website on January 1, 2005, PostSecret has collected and displayed upwards of 2,500 original pieces of art from people across the United States and around the world.
The site, which started as an experiment on Blogspot, was updated every Sunday with 10 new secrets, all of which share a relatively constant style, giving the artists who participate some guidelines on how their secrets should be represented. It recently began posting approximately 20 new pieces each Sunday after a week where Frank Warren mysteriously did not post any new secrets for one week.
From June 24 to July 3, 2007, the "Comments" section of the site was enabled. While a comments feature is frequently present on blogs, it had been previously absent from the PostSecret site. Many visitors viewed the presence of a comments section as out of character for the site, which was previously distinguished as a non-judgmental space for participants to reveal personal secrets. Many visitors felt that the new section contradicted the purpose of the site, as evidenced in numerous comments criticizing a postcard in which the author claims to have fed bleach to his/her cat.
In October 2007, the PostSecret Community was launched (www.postsecretcommunity.com
). Since its inception, more than 39,000 people have registered for the online discussion forum. Questions have been raised about how the forum affects the anonymity of the PostSecret project, but for those involved on the Community board, there seems to be a positive response of people who haven't sent in a postcard or haven't seen their secret on the site sharing their secrets with other PostSecret fans.
According to Youth Trends' February 2008 "Top Ten List Report" PostSecret was the 10th most popular site amongst female students in the USA, with 7% of those polled naming the site as their favorite. 
In April of 2008 Warren teamed up with 1-800-suicide to answer some of these anonymous cries for help through peer run crisis hotlines on college campuses.
Frank Warren is currently hosting events at numerous colleges to speak about the many different secrets of today's society. An art exhibition--also currently traveling the country--showcases many of the hundreds of thousands of secrets Warren has received.
The site encourages others to create and send in your postcards; Postcards to be sent into PostSecret are addressed to:
13345 Copper Ridge Rd
Germantown, Maryland 20874