From an article by Dan Gillmor:

The pro-democracy Six/Four project from Hacktivismo is a potentially valuable step to protect political dissidents and other people who have the quaint idea that their access to information shouldn’t be thwarted by government-run firewalls in places like China and Saudi Arabia.The basic idea is to use the Internet’s decentralized nature in a way that lets people create anonymous, secure data tunnels from here to there and everywhere. If this works, governments will be harder-pressed to prevent their people from communicating freely and seeing online material that, for whatever reason, is considered objectionable.