Turns out I need to move this blog to a new server today. Who knew! (Apparently I was supposed to know but I forgot.) *grin*
Anyway, all the work should be taking place on the back end and completely invisible to readers, but it is possible that if you comment at exactly the wrong time, your comment may be eaten. So be aware of that.
[Update] Theoretically we are now transitioned to the new server. Please let me know if you see any irregularities. Thanks for your patience!