I had a chance to talk with Lance Cotrell, President of my new favorite company, Anonymizer.com, last week, in reference to his company's plans to circumvent the Great Firewall. He mentioned that his company initially had a contract with VOA to help mainland Chinese get around the firewall, but that given circumstances in Iran, work had shifted there, with some success.
Then, this point: that while Iran hadn't been as aggressive as China, they had recently been stepping up their efforts, becoming almost as active as the Chinese in recent months.
Think maybe they've been getting some help?