Even if you choose to use disposable diapers, thinking ahead a little could help you diaper your baby in an emergency (like stuck between towns in western Kansas or a natural disaster like we've seen in Japan). Cotton Babies has a great post full of ideas for cloth diapering with a minimum of supplies.
Of course, you might lose the Internet in the case of a natural or national disaster, so you might want to print the post out for a Disaster Binder. (I don't have one; my main plan is to depend on our copy of The Encyclopedia of Country Living.)
HT: Arwen at Faith and Family