I am in a tornado area and a widget that sounds an audio tornado alarm (for the area of the user) would help save lives. It would be like the weather radios, but since the chumby is always on, it is a prime candidate for this sort of thing.  A special weather alarm widget could be designed that covers thunderstorms, hurricanes or tornadoes each with special sounds.  The screen can also be made to flash red and white for those can't hear the alarm or if the sound is off.  There are probably other disaster alarms that can be made along the same lines like civil defense, floods, fire, volcano, avalanche, etc.