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.
http://www.ds-osac.org/

Foreign Affairs Canada: Travel Reports

Canadian government's official travel advice.
http://www.voyage.gc.ca/dest/ctry/reportpage-en.asp

iJET Travel Intelligence

Commercial organisation providing detailed travel advice and warnings for various destinations.
http://www.ijet.com

Australian Department of Foreign Affairs and Trade

Official travel advice for Australians covering all destinations.
http://www.dfat.gov.au/travel/index.html

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.
http://www.comebackalive.com/df/dplaces.htm

Lonely Planet Thorntree

The Lonely Planet travel guides' message board. Contains detailed questions and answers from travellers about the current situation in most places.
http://thorntree.lonelyplanet.com/thorn/branches.pl

expatexchange.com

Registration for email newsletters containing critical travel warnings designed for US expatriates.
http://www.expatexchange.net/expat/index.cfm?pr=newslettercen

Air Security International's Hot Spots

Detailed listing of security related news items from around the world updated daily.
http://www.airsecurity.com/hotspots/HotSpots.asp#Amer

Travel Safety Information

Official travel advice and warnings from the New Zealand government.
http://www.mft.govt.nz/travel/

Kroll - The Risk Consulting Company

Risk assessments for business travellers in the Middle East and Argentina. Register for email newsletter.
http://www.krollworldwide.com/library/

Sign in Safe

Offers the latest travel safety news, along with tools to monitor the safety of people as they travel.
http://www.signinsafe.com/

U.S. Department of State: Travel Warnings & Consular Information Sheets

US government's official travel advice and travel warnings. Registration for automated email updates.
http://travel.state.gov/travel/warnings.html