Ironically, there is already a HN subreddit.

But it's join-by-approval only and there's nothing there.

There's also http://www.reddit.com/r/hackerjerk

I don't think so. From my understanding he is talking about a HN clone that only allows posts about new HN clones.

Yes, that's what I meant. And this would beg for a Meta version of itself, although I'm not sure what that could be..