According to the American Chamber of Commerce in Korea, 627,000 Korean visitors to the US in 2004 spent an average of $3500 per trip. Plus over 57,800 Korean students studying in the US, Korean nationals contribute a total of $ 2.2. billion in tourism revenue to the US. A report by the U.S. Department of Commerce predicts these figures could double if Korea entered the US Visa Waiver Program.
Go here if you would like to support this effort. The website includes an on-line petition.