One of my favorite TED talks this year was PostSecret's Frank Warren. Over 500,000 people have sent him postcards with their secrets. I also interviewed Frank on video when I was at TED.
Frank Warren is the creator of The PostSecret Project, a collection of highly personal and artfully decorated postcards mailed anonymously from around the world, displaying the soulful secrets we never voice. Since November 2004, Warren has received more than 500,000 postcards, with secrets that run from sexual taboos and criminal activity to confessions of secret beliefs, hidden acts of kindness, shocking habits and fears. PostSecret is a safe and anonymous "place" where people can hear unheard voices and share untold stories.