Reports of this blog's demise were greatly exaggerated.
The adequate engineers at MediaTemple were able to recover the database in the backup from early Sunday. This has cost me all the posts from Sunday and Monday, but it looks like everything else has been restored.
Posting will continue as soon as I have run a few tests to make sure that everything works. (And of course beatings will continue until morale improves.)
Thank you, Kat and John, for giving me the names of a couple lawyers who could have helped me with the worst-case scenario (getting compensated for a destroyed blog).
And thank you to everyone else who expressed sympathy with my situation. I appreciate the moral (and in several cases, financial) support.