Originally I thought that we shouldn’t get involved. However, now that Russia has invaded Georgia beyond simply occupying S. Ossetia I don’t believe that we can afford to sit still and let an ally be crushed. We should use the same sort of brinkmanship that we used in the Cold War. Perhaps sending a carrier group into the Black Sea and relocating a fighter wing into Georgia. By doing that we would show the Russians that we are serious without actually attacking them and provoking WWIII.
Russia would be crazy to risk killing them.