Hooray! I took a lot of time. Looked at the Yahoo Web Hosting help. Looked at the WordPress forums. I tried a couple things. I looked at my phpmyadmin installation, and it said the comments table was busy. I looked around some more, and figured out how to ask it to “repair” that table.
It worked! All my comments are back! Huzzah! Calloo! Callay!
That took some time, but I’m very happy it worked. During the Comment Challenge is NOT the time to lose all comments.
Though anyone who commented in the last few weeks, I think your comments are probably gone. Though I will check spam just in case.