Of course there is no objective choice on that, but to give a bit of counterweight to that, I would note that Assange didn't leaked the information. He published it. He was not the one risking prison for getting the data out of the US network. Also the mainstream don't care that much about Assange like the geeks & journalists do. Most people don't care about the cables either.

Zuckerberg, though, created a tool that is used by many many people, and impacts much there daily life and the way they interact together. Facebook brought social networks to the masses.

Assange is in the runner-up, and history will tell what the right choice was.

Also finally, I would have expected the crowd here to be a bit more happy to see a geek - and startup founder - make the headline.