Okay, this is pretty fascinating. I pretty much challenged people to justify preparations for an EMP attack. I still don't think that EMPs are particularly high risk scenario. Although the possibility of solar flares/sun spots wrecking havoc is far more worrying. I think many of the preps centered on an EMP attack are useful. However, worrying about whether your electronics will survive seems a bit superfluous. Besides who really wants to live in a Faraday cage, or have to get their computer out of the grounded copper box every time you use it.
Finally, in terms of terrorist attacks, I don't think the cost benefit analysis of an EMP attack really supports it. A major space program would be necessary to send nuclear bombs into low earth orbit. If you have an atom bomb and an airplane, set the bomb off on the top floor of a sky rise and fly the airplane into the transmission lines for the Niagara falls power plant. Collapse of those transmission lines will cause the same sort of cascading powergrid failure that an EMP would, probably far more effectively then an low grade EMP. Meanwhile a large scale, high casualty attack at the same time would cause total confusion and fear.
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A gentleman should always be able to break his fast in the manner of a gentleman where so ever he may find himself.--Good Omens