I think it's all overrated. I don't see why we need to have these documents online wich might be a potential danger in more ways then just terrorism (something people love throwing around these days).
Besides. Do we really have to know that Ambassador A called Ambassador C a silly name? Or that the port of Rotterdam is imporant for the USA? I mean.. It IS the biggest port in the world so it's logical that it is important for the USA. (and probably the rest of the world that trades with Rotterdam. Not everything is about the USA.)
Plus, if someone would put a document on Wikileaks wich is completely false, everyone would take it for real. Since denying it is no option, because the government always lies, since wikileaks always tells the truth and never lies. [/sarcasm]
if you havn't noticed, I find it rather annoying and mostly unnecesary. But that's my opinion.