From Barry Ritholz the Big Picture blog:
Here is the sad reality: Can you really embarrass any [... U.S.] banks?
They were incompetently run, with criminally inept risk management. They blew themselves up, and exist today only due to the largesse of the taxpayer. They gratefully took all they could grab and more.
What else can you release to embarrass them?
Unless they have 5GB of video showing their CEOs engaging in bestiality, its hard to imagine Wikileaks embarrassing the big banks.
Harsh but probably true, even the Vampiresquid GS got away with "murder"