Robert Korver has written an eye-opening article about his experiences on CPAC. See http://www.becounsel.com/wp-content/uploads/2011/06/Korver_Art_6_2011.pdf
In particular, Korver writes in Celator Magazine about his concerns that State Department bureaucrats aligned with archaeological interests have hijacked the process for imposing import restrictions on cultural goods. Celator Magazine publishes articles of interest to ancient coin collectors.
I should also note my gratitude to Mr. Korver for mentioning my work on behalf of collectors and the small businesses of the numismatic trade. (I've done legal work and lobbying for IAPN, PNG and ACCG-- some of it paid, a lot of it not.)