Yes, indeed, it is ours - I first heard it back in June 2009, on Seth Godin's blog. It got posted up on Hacker News too.
Here's the seth post of the same video, making the same post (though he reckons guy #3 is more important than the first follower):
I posted about it on June 6: http://sivers.org/dance-lessons
Seth posted on June 10: http://sethgodin.typepad.com/seths_blog/2009/06/guy-3.html
Not being competitive. Just making it clear I wasn't copying Seth's idea.
Guy #2 and #3 were definitely critical here. Both were needed, and in the same order. (Guy #3 didn't seem like he was willing to have been guy #2.)
So many people telling me the idea should be developed into a book, but I don't want to, so I was just letting it publicly be known that the idea is up for grabs.
Hoping to encourage someone who wants to run with it, knowing I won't compete.
OK not too late - but where is the fun in taking somebodies meme?
The tricky bit is that I'm not really looking for one-person open source projects to contribute to, so how would I ever notice them? It seems like there's an opportunity here.
IMHO, this is detrimental to quality and doesn't fend off bandwagon bias.
The problem like with Gladwell's "Tipping Point" and "Blink" is that they sound actionable but aren't really.