Damn 503!

I just wrote a six paragraph comment, took me a good 15-20 minutes and several tissues. Rechecked and ready to go, I hit Preview. What I got back was that damn 503 error. When everything came back it goes without saying (but I'm going to) my piece was gone. As I wrote it from the heart and in the right mood I know I won't be able to rewrite it.

It was just after midnight CST, and if my memory serves me correctly it happened at about the same time a couple of days ago.
Is there a set time for this to happen?