...was released that I know of was released by a reporter in a book he wrote, and it was for the unredacted version of the cablegate cables. This wouldn't normally be an issue but the encrypted file itself, which was distributed to just a few newspapers, managed to leak out. At that point, IIRC, Wikileaks took heat for distributing the encrypted cablegate file (with unredacted contents) but by that point the only people who didn't have access to the information contained therein were regular folks like you and me. Corporate, government and news entities already had access to copies which was why Haaretz was able to corner the market on Syria/Israel/Iran cables well in advance, if I remember right.
I don't believe the password for the insurance.aes256 has ever been released. I think it's absolutely reasonable to assume there is information within which has still not been released but it almost certainly also contains information which has, in its unredacted form.
Those are just my guesses.
PB