Hmm. Still skeptical.
Blaster blackout? Sophos questions rumours that internet worm was responsible for North American power cuts: "Critical computers running power stations are unlikely to be linked to the internet and vulnerable to this kind of attack,"
But that would be naivety there... %)
"'Of course, the power cut may have affected some users' ability to ensure their computers are protected against the worm. "
I'd say being *off* would be pretty good prevention against infection.