We've been suffering a total power outage today. Fortunately, the vital parts of our infrastructure are located elsewhere and built with redundancy, thus I was able to work from home. But this incident shows that redundancy doesn't mean that one's completely safe. We have two independent power lines at that building, apparently both broke.
And to the smart-asses who suggest purchasing a huge generator (and it has to be really huge): the building is just north of old town Nuremberg, in a tightly packed area with offices and homes. There is no way we could run a generator for hours there. It probably won't help, either. We were hooked up to a generator at the old building in 2001, but it was causing frequent power losses instead of preventing them.
Update 2008-10-11 09:15: the power is back.