Wikileaks.org is an uncensorable version of Wikipedia for untraceable mass document leaking and analysis. It combines the protection and anonymity of cutting-edge cryptographic technologies with the transparency and simplicity of a wiki interface."

Wikileaks is developing an uncensorable Wikipedia for untraceable mass document leaking and analysis. Our primary interests are oppressive regimes in Asia, the former Soviet bloc, Sub-Saharan Africa and the Middle East, but we also expect to be of assistance to those in the west who wish to reveal unethical behavior in their own governments and corporations.

According to their FAQ page
Wikileaks expects to go live sometime in February or March 2007.

Read more on their Media reports page.