If you're interested in the guy in charge of Wikileaks, I'd recommend these three things: an analysis by zunguzungu of some of Assange's earlier writing, a long interview of Assange conducted on 11 Nov 2010 by Forbes's Andy Greenberg, and the accompanying Forbes cover story, also by Greenberg.
I've excerpted and commented a bit on these and my sense of Assange more generally in the Bloggingheads forums. If that notion doesn't send you fleeing or induce narcolepsy, start here, here, and here. The short version is: I find zunguzungu's analysis interesting though not conclusive, since I think Assange has evolved since then. I also find myself in strong agreement with quite a bit of what Assange had to say to Greenberg.