U.S. Expands Role of Diplomats in Spying - nytimes

WASHINGTON — The United States has expanded the role of American diplomats in collecting intelligence overseas and at the United Nations, ordering State Department personnel to gather the credit card and frequent-flier numbers, work schedules and other personal information of foreign dignitaries. - US Expands Role of Diplomats in Spying
US diplomats are not spies: Crowley - AFP - Los Angeles Times
The Guardian - Wikipedia: United States diplomatic cables leak
YouTube - WikiLeaks releases diplomatic cables