I can't begin to comment on the deep-seated grand political intrigues of the Caucasus, so anyone wanting more on that front is welcome to read folks such as this: http://www.belgraviadispatch.com/2008/08/georgia_on_my_mind.html
But it doesn't take a rocket scientist to see that this is more consequences of our misadventure in Iraq. If we had kept our eye on the ball and finished off the Taliban in Afghanistan with sufficient force instead of frittering it away with an ill-advised and poorly-conducted war in Iraq we (the U.S.) would have both the military force to have options and the credibility that success would have brought so that military options wouldn't be required.
Instead we have over-extended, over-committed and worn down the military so that we have no realistic military options at all. AND, instead of appearing strong and no one to trifle with the limits of U.S. power have been exposed for all to see in their naked glory because of the way we allowed ourselves to get mired in two long wars without apparent victory or end. (Bushite comments about how things are better in Iraq now display their cluelessness -- the damage has already been done. "Winning" now, whatever that means, doesn't rebuild the reputation that we had for decisive effectiveness we enjoyed before Iraq. It's too late for that.)