[SkyMarshal]

Start a Stackexchange site with like-minded HN folks?

http://blog.stackexchange.com/post/518474918/stack-exchange-...

And don't forget good ol' Slashdot. Alot of the old trolls moved on the new hotness social media sites.

[Todd]

There's already startups.com (but it doesn't cater to the same HN group). The problem with SE sites is they are geared more to solving problems and less about having a dialog.