Here is an excellent current article on how to use Techie items during an emergency. It covers good sources and great ideas. This way you can keep in contact with family and friends during an emergency.
FCC, FEMA offer new tech tips for emergencies http://www.cnn.com/2011/09/22/tech/mobile/mobile-emergency-tip-sheet/index.html?hpt=hp_bn6
Why I have a Smart Phone! Judy