It seems that Google, errr Blogger, is have some kind of issue that prevents me from leaving comments on this blog and others, too. It's been a "known issue" for some time, and they incorrectly report it "fixed." Apparently it's preventing me from even reporting it!!
Okay ... I *wish* I'd thought to do that sooner. Switching to Google Chrome "fixed" the problem. Nice marketing strategy, Google!
I've edited this post to remove the "e-mail me your comments" content, but I'll leave the rest up in case others are experiencing the same problem.