As I've noted before, and surely will note again, I try to strike a balance in my comment moderating between keeping comments on-topic (of the blog post they're associated with) and free-floating comment conversations, which sometimes veer into "message board" sorts of frequent back-and-forth talk.
Things have gone too far in the message board direction, with an excessive amount of personal attacks, insults, and such. So if someone's comment hasn't been approved today, don't take it personally. This is just my way of bringing back an added dose of civility, respect, and relevance in comments.
I just added a new Open Thread post where comment standards are less strict. So please keep "message board" sorts of interactions there, and personal insults to a minimum. If your argument depends on calling someone else an insulting name, consider whether you even have a reasonable argument.