In the past few days, a couple of readers have emailed me that comments they'd left weren't appearing. I'd wondered about the drop-off in comments myself, since I hadn't received any notifications for more than a month. Turns out this has been a widespread problem on Blogger since May 25. It hasn't officially been fixed yet, but I found a workaround and have just implemented it.
All comments from May 25 through today have now been published, and I'll be responding to them shortly. I'll start receiving comment notifications again, so there shouldn't be another month-long delay between the time you comment and when your comment actually appears! Sorry for this problem—please keep reading and commenting!