Our Web host underwent an attack on one of his servers. (For you geek types, the attacker exploited a vulnerability in the cPanel interface, and did enough damage to the systems files that our Web host had to reinstall the operating system and cPanel.) This caused a cascade of other problems, resulting in my Web site and blog being down off and on over the past 24 hours. The Web host is still reinstalling backed-up files, so everything is not yet fixed.
End result: Some posts are now missing. Some of your comments may be missing. I hope all the missing material will reappear soon, but no promises.