Along with the new emergency 9-1-1- text service, here are the Top 50 Emergency Uses for your Camera Phone by Paul Purcell (thank you Kim Stephens for the link) http://cameras.about.com/od/cameraphonespdas/a/emergency.htm
If you're on Twitter, some dispatch and emergency responders now monitor tweets. Check out hashtags #smem and you will see the latest topic being discussed. Need help right away, tweet that hashtag and someone will most likely pick up your emergency and direct help your way.
Check out last November's small research project along side FEMA's National Emergency Test and Stephanie Jo Kent with hashtags #smem and #demx here: http://www.reflexivity.us/wp/2012/01/emergency-warning-and-community-response-the-edge-of-technology-and-culture/
Spread the word, good things are being done to include the deaf and hard of hearing citizens of the USA.