The Treasury Department seems to be seriously considering converting loans already made into stock.
There's already hissing from the conservatives about nationalization, but this could only be temporary nationalization like was done in Sweden.
But even after nationalization and they resell all of the assets back into private hands, I wouldn't mind seeing one bank remain nationalized to keep the private banks competing with a bank that charges little or no interest and no exorbitant fees. This would be a "citizen's dividend."
As long as the banks have someone that will compete against them, there shouldn't be any problems.