CEP Customs Broker Inc. (Popularity: )
http://www.cepbroker.com/ Offers services to import merchandise into the U.S. including food, tobacco, clothing and machinery. Includes FAQ and contact details.
World Customs Organization (WCO) (Popularity: )
http://www.wcoomd.org/ Independent intergovernmental body whose mission is to improve the administration of customs. History, structure, activities, and member countries.