Assange and his band of techno freedom fighters are doing something not so different from launching a major startup against a flood of large entrenched competitors. It's very similar in that they need to cross a chasm and seize their audience against many odds. There are many software technology, product development, marketing and PR aspects we can learn from here.
And the cause, well, we may not all agree with the cause but it's a heck a lot more courageous to fight for your ideas than for a pile of cash and equity!