Whoops.  The server hosting this site sort of went comatose, resulting in about 5 hours of downtime.  Sorry for the inconvenience.  It is back up now.

I'm not quite sure what took the machine down.  The syslog (local and remote) were clean, so the only hint of what happened would have been shown on the console.  I'm working with my colocation provider to find out if anything was on the console before it was rebooted.  Even then, I may never know what happened.

Yay for journaling filesystems and redundant drives!