The whole idea of Wikileaks is terrific. They've become one of the most important watchdog organizations on the planet, helping to expose a lot of government action for what it really is.
And on a more fundamental philosophical level, this is in keeping with my sense of justice. Crooks should not get away with their crimes just because they hold lofty titles, wear spiffy uniforms, and call their crimes great deeds necessitated by "national security," "economic stimulus," or whatever other nonsensical lies they come up with.
A handful of nonviolent individuals took on the world's greatest superpower, as a matter of principle, and won. That just goes to show yet again how technological advances tend to flatten the power pyramid of society.