It's interesting to see the objectives people attribute to wikileaks, without even reading what Julian Assange has written regarding the objectives of wikileaks. It's certainly not for the fame, as Draugnar says, and I don't think it's even in the name of pure transparency as mcbry would have it. I think Invictus has been pretty clear in his posts with regard to the possible consequences of the leaks, but I'm not sure if he realized that this might be exactly what Assange is setting out to do.
Here's a good article that discusses one of Assange's essays:
http://zunguzungu.wordpress.com/2010/11/29/julian-assange-and-the-computer-conspiracy-%E2%80%9Cto-destroy-this-invisible-government%E2%80%9

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I was almost put off by the use of the word conspiracy, because of my natural inclination to scoff in skepticism at the use of the word, but it is used in this article in a different manner than is classic, so I hope you'll bear through it, because I think it's worth reading.