I remember hearing this on the Evil Radio while I was out on whatever day it happened.
The FIRST thing they said was that it wasn't a terrorist act. IMO, they're giving those f***tards way too much credit. They'd sooner kill people than inconvenience them, the bastards.
Well, in this day and age of technology, a power outage can be a SERIOUS inconvenience across the board. It affects the water supply, all the electrical devices in your own home, as well as ATM's (how many people depend on ATM's for their cash?), stores, phone systems (how many people here don't even own an analog phone anymore?), banks, businesses in general, etc. So, don't discount the IDEA of attacking the power supply as a terrorist act until you see how far reaching the effects can be.