So far, statements by Obama of the US have specifically distanced the idea of military intervention.
"If in fact they continue on the current trajectory theyre on, then we are examining a whole series of steps economic, diplomatic that will isolate Russia and will have a negative impact on Russias economy and status in the world." -Obama
Obama said he is "deeply concerned", he said it's a violation of sovereignty, and he said the US would withdraw from the June G8 Summit which will be held in Russia. Kerry said said it's an act of aggression, that you don't do this in the 21st century, etc.
So it's pretty clear that whatever else they're talking about in their meetings, they're being careful to never mention anything about a possible military intervention, even as an option.