This is a great illustration of why exposing yourself to randomness is useful. I'd bet that all successful startups have similar stories of chance meetings that led to something great.
The most important thing he says is at the bottom or the post:
"Just don't think about these relationships through the lens of "what can you do for me?" -- not only will it doom you from the start, you'd never even guess what might happen anyway."
I guess he uses Facebook differently from the way I do. I've met every one of my Facebook friends in person. (Although it's been a while, as my old high school classmates keep showing up.)
I thought "fake" friends was more of a Myspace or Livejournal thing.
I like dropping the f-bomb, so perhaps my title was overly hostile. I hoped the takeaway would be that real-life interaction is still the best place for serendipitous encounters.