I can save them a bunch of money.
"Increased newspaper sales (a rarity), politicians have something to talk about, life goes on."
From what I've heard, most of them concern diplomatic gossip. While reading about suspected marital cheating by foreign officials is no doubt interesting, they are politicians after all. Not really shocking. I don't see the cables having a long-term effect.
However, I am interested in that State Department directive signed by Hillary, directing our diplomats to spy on other diplomats. Obtain their CC numbers, computer passwords, etc.