What other groups do HN users recommend?
There is a usenet thread discussing groups for geeks here: http://squte.com/usenet/comp.misc-list-active-newsgroups
Among those recommended are: comp.editors, comp.os.linux.advocacy, sci.electronics.repair, rec.games.roguelike.nethack, sci.logic, sci.physics.relativity, alt.philosophy & uk.rec.sheds
(Or reading it through Google Groups: https://groups.google.com/forum/#!forum/comp.misc )