Errors from Google are rare. For it to cache one of these errors is even more rare. I remember there was a screen shot of a bunch of server code when Google had errored in the past.
I don't think there is any manual intervention at Google unless somethign is really bad. I have noticed the last three weekends a bunch of server errors on some of their services with the latest popping up tonight at blogger. I don't think anything is really wrong right now at Google except they keep growing their services faster than their processors and bandwidth can keep up with them. While this is frustrating to most of us hard core Internet users, the problems will smooth out over the long run. (I think and hope!)