HN Is this forum Software available?

It's written in pg's lisp dialect Arc. IIRC, a version of the news app is provided with the official Arc distribution, available here: http://www.arclanguage.org/install

See also the Arc Forum http://www.arclanguage.org/forum and the unofficial Anarki version of Arc (which, again, includes news.arc): http://github.com/nex3/arc/tree/master

Also thanks for the reply.

It looks like it's released with Arc:

http://news.ycombinator.com/item?id=494421

That's excellent, thanks!