Well, US aircraft, troops, and naval units will all particiapte in the "humanitarian" effort in Georgia. IMHO, their presence there will much more likely ensure that the fighting stops because I do not believe Russia wants a war with the US.
That presence will also bolster Georgian and Ukrainian feelings towards the US.
I expect what Russia did in Georgia is much more likely to lead to Ukraine and perhaps Gerogia being admitted into NATO...but we shall see on that. Certainly, as we are already seeing, you will see nations like Poland coming much closr to the US and basing of US military units and missile shields in their countries.
I believe Russia's attempts to send a blunt message to these former satellites is going to backfire in a big way...and from talking to people I know in Georgia, and friends I have who have relatives there, I believe in the next election in Georgia, if the figthing indeed ends, if Russia does not turn around and make a grab for Tiblisis (which at this point will be very difficult for them to do politically), and with a US presence there, that you will see Saakashvili win an overwhelming re-election.
I expect Georgia will also be replacing much of their losses with much newer, more state of the art, western military equipment. I believe that will be another unintended consequence of this action.
But we shall see.