see for the leaked messages here:
http://privatepaste.com/f9dd332518/weqwewqesada
https://privatepaste.com/942ba3fa3d/asdasdwqe
(source: http://cryptogon.com/?p=30775)
Anyway, I don't think wikileaks can seriously be stopped from disseminating information if they choose to, there are a thousand ways to spread it and zero ways to unspread it.