US State Department
www.state.gov/travelandbusiness
Topics related to business travel
www.business.com/Business-Travel.asp
Travel resources
http://www.thetravelinsider.com
Global airfare search engine
http://www.qixo.com
Union of International Organizations
http://www.uia.org
Specialized global transport
http://www.worldcourier.com
Global Risk Services
http://www.airsecurity.com
GSM & satellite rentals
http://www.mobalrental.com
International calling codes
http://www.countrycallingcodes.com

Some of my personal favorites
www.worldpersonalassistant.com
www.estelle.tv