The only action that any third party is in any position to make is to impose swift sanctions against Russia. These will be about as effective as they were against Iran, Iraq, Cuba, et al. In other words, it won't accomplish squat. And with Russia potentially controlling that oil pipeline, it's dangerous for us to be playing that card. As the world's #2 petroleum exporter, they could really put us in the hurt locker considering how fragile our economy is vis a vis the price of oil.

The only other action I could see us taking is to boost our aid to Georgia and hope that they're able to mount one hell of a guerrilla campaign.