I slept for only about an hour last night, and i'm feeling better than i have all week. I have no explanation.
My web server is now experiencing a hard drive failure (on the new drive that was installed after the old drive was messed up by a hacker). This is truly remarkable, but not so bad, since i've hardly had time to do anything valuable on the new drive yet. The RackSpace folks have been exceedingly patient, helpful, and responsive through all of this, to their credit.