Fielding's DangerFinder: A somewhat 'gung ho' approach to dangerous places but contains detailed information about how to keep safe in some of the world's most dangerous places. Also has a traveller's bulletin board.
Kroll - The Risk Consulting Company: Risk assessments for business travellers in the Middle East and Argentina. Register for email newsletter.
Lonely Planet Thorntree: The Lonely Planet travel guides' message board. Contains detailed questions and answers from travellers about the current situation in most places.
Overseas Advisory Council (OSAC): Private/US Government partnership. Issues travel advisories and announcements. Database of news items related to overseas incidents, mostly specific to US interests.
Sign in Safe: Offers the latest travel safety news, along with tools to monitor the safety of people as they travel.