After reading Digital Weapons Help Dissidents Punch Holes in China's Great Firewall, I can't help thinking that there must be something interested parties can do to help. My thoughts begin along the lines of BOINC or the World Community Grid -- distributed computing like SETI@Home and other similar projects.
The article mentions The Global Internet Freedom Consortium, which promotes several actively-developed software solutions.
I suppose a person could host a run a Tor relay, but that doesn't really answer the mail.
I was thinking about this back during the Iranian protests, too...
What do you think?