I've had PostSecret on my blogroll since the beginning, because it is undoubtedly one of the coolest websites out there. In case you've been living under a rock, it's the site that posts the anonymous secrets people send in on their homemade post cards. (Yes, kind of like that All-American Rejects video.) It's updated every Sunday, and just gets better and better.
Update: A PostSecret exhibition is scheduled for May 25, 2006 at the Old Town Theater in Alexandria, Virginia.