I was a bit bored sitting at my computer, so I started a group. Of course, this tradition (the six-word story) goes back at least to Hemingway's brutal: "For sale, baby shoes, never worn." story. Unfortunately, I left all my examples at work, but here's a couple off the top of my head, to be updated later.
Hello. Nice to see you. Goodbye.
Sorry Love, heartbreaking is more interesting.
Also, see the write up in Wired magazine: http://www.wired.com/wired/archive/14.11/sixwords.html. For more examples.