Finderdoug, woo hoo...
That gentleman from Foreign Policy magazine emailed me on the Chomsky, CIA business. Here's his answer:
"First, the CIA made this written request to the FBI, requiring the creation of a file. Second, the basis for this request was information CIA officers had learned about Chomsky and others, the catalyst to this request. Third, the memo lists the names of specific individuals, and the FBI, in its report, would provide all information it had on the listed individuals (which included Chomsky). Both the CIA and the FBI collected information on individuals of interest at the time and the 1970 memo confirms the Agency’s interest in Chomsky. Last, the FBI and the CIA in the 1960s/1970s had an informal liaison program wherein they shared information—thus this CIA request.
Let me provide a specific citation to the FBI-CIA liaison program that I referenced. Initiated in 1966 to effect better “coordination,” the program was intended to delineate CIA and FBI responsibilities: for the CIA external for the FBI internal. The discussion of this informal liaison program is in the Church Committee’s 1976 reports: pp. 519-521 of Book III and pp. 97-99 of Book II. I discuss this relationship on pp. 183-184 of my book The Quest for Absolute Security, if you have better access to the book rather than the Church Committee reports.
One further point. As you perhaps know, in 1967 the CIA initiated Operation CHAOS under which it’s officers infiltrated, and monitored, domestic anti-war and civil rights organizations. The program was not known to the FBI. This makes the 1970 memo of particular interest as the CIA, through this program, would have become aware of the activities and plans of anti-war activists such as Chomsky and Meacham, for example—thus the specificity of this 1970 memo to the FBI on the plans of these individuals. It appears that one basis for this 1970 CIA request was to obtain information about these individuals to supplement the Agency’s monitoring activities. As the request was posed in the guise of an interest in the international travel plans of the individuals, the request would seem legitimate and, also, would mask the fact that CIA officers were currently involved in domestic surveillance (without the FBI’s knowledge and inconsistent with the 1966 liaison program)
Lastly, here's a statement I received from Archives, regarding whether the CIA contacted it before destroying Chomsky's file.
"No, NARA does not have a record of the CIA reporting to NARA the destruction of records concerning Noam Chomsky.""