The current version of Arc Lisp (which includes the forum) can be found at <a href="http://arclanguage.org/" rel="nofollow">http://arclanguage.org/</a><p>And the public, open source fork of Arc and the forum are at <a href="https://github.com/arclanguage/anarki" rel="nofollow">https://github.com/arclanguage/anarki</a><p>Bear in mind nothing publicly available is at feature parity with Hacker News because HN is essentially closed source for various (mostly YC business) reasons.