The iPhone could save your life.
iPhone Atlas staffer David W. Martin posted a great write-up today about how his iPhone helped him through Hurricane Ike.
David used applications like Weatherbug and Twitterific to stay in touch and informed. But one of the coolest applications he mentions is called 1st Responder. It allows one-touch 911 dialing, stores your medical alert information (like an allergy/diabetes bracelet, but digital), and even gives instructions for basic First Aid techniques (not to replace actual in-class training of course, but it would be a good reminder reference).