This is a good idea.
http://www.eastanglianambulance.com/content/news/newsdetail.asp?newsID=646104183

http://www.eastanglianambulance.com/content/news/newsdetail.asp?newsID=646104183
.....By entering the acronym ICE for 'In Case of Emergency' into the mobile's phone book, users can log the name and number of someone who should be contacted in an emergency.
The idea follows research carried out by Vodafone that shows more than 75 per cent of people carry no details of who they would like telephoned following a serious accident.....