Information Policy has an interesting report on a presentation that Evgeny Morozov (Georgetown Institute for the Study of Diplomacy) gave at Foreign Policy's Washington office:
"Authoritarian regimes have learned how to block certain computers from accessing the Web... The Internet is not the first free speech facilitator to fall short of expectations. ... Since the Cold War, Radio Free Europe/Radio Liberty, the US-funded broadcaster, has used shortwave frequencies to report news to countries that ban free press. But throughout history, oppressive regimes have countered with espionage and misinformation campaigns to discredit the broadcasts"