If you've been having trouble commenting, you're not alone—the comment form quit working for me a couple days ago.
I wrote in to Erin, and from where I'm sitting, the problem has been fixed. If you're not getting comment-form love, email me at dorothea.salo at gmail and I'll see what I can do.
Speaking of comments: I am despotic about them, I'm afraid. If I suspect you're a spammer, or if I'm sure you're a timewaster, your comment will silently disappear. I don't expect to have to pull the trigger often (even spam levels around here have been muted), but a warning is only fair.