Psiphon

Designed and invented in Canada, "Psiphon is a human rights software project developed by the Citizen Lab at the Munk Centre for International Studies [in Toronto] that allows citizens in uncensored countries to provide unfettered access to the Net through their home computers to friends and family members who live behind firewalls of states that censor."

Here's how it works:

"Psiphon works by first allowing a person in a country like Canada that does not censor Internet content to set up a user name and a password for a person in a country that does -- China, for example.

"The Canadian user would then pass on the information to the Chinese user, who would log on to the Canadian's computer and effectively use it as a server to browse the Internet without being censored by the Chinese government." --CNN article

If you are interested in trying it, you can download it here

A response to Peiking Duck's mention of Psiphon asked a good question:

"This may or may not be related information, but the SSH tunnel that I've been using over the past six months or so is no longer functioning. Well, not functioning isn't quite the right wording... I can still visit all the same sites I'd be able to visit when not using the tunnel, but Technorati, Wikipedia, and the BBC News (all previously accessible) or now consistent timeouts. If this is the work of our loving Cyber Nanny, I don't see what would stop them from disrupting Psiphon." Posted by: michael

Guess we'll have to see....