Sean points out (in the middle of a grab-bag linkage post that's got some other cool stuff, so go have a peek) Postsecret, a photo-blog that consists of postcards sent to the address of Postsecret's blogger. The catch is that the postcards are (a) anonymous, and (b) feature confessions of deep, dark secrets. There's some whacko stuff, some icky stuff, and a few that are kind of haunting. This is the type of thing that fuels my writerly imagination.
EDIT: I've changed the date of this post so I don't have a single post bumping an entire day's worth of stuff off the main page, just for now. A small thing, perhaps, but it's the small things that bug us most of all, right?