PostSecret describes itself as "an ongoing community art project where peoplemail in their secrets anonymously on one side of a postcard." The blog is updated every Sunday with scans of these postcards, which are sometimes funny, sometimes sad, and often leave me filled with despair about what we leave unsaid. Here's a topical example:
I especially enjoy PostSecret for its German edition, which is an easy and fun way to keep my skills fresh.
There are also French, Spanish, and Korean editions, with all except the Korean one having English translations available. Check it out.