Another thought:

If any useful electronic device survives an EMP it will be worth 20 times it's weight in gold. Do you really want to have to protect your iPOD from murderous theives? Think "Waterworld" where dirt is priceless.

Not trying to go TEOTWAWKI, but you should consider what effect protecting/taking things with you will have. You do NOT want to stick out like a sore thumb after any event that effects ALOT of people.