@wretchard:
The only after August 18 US government statements on Georgia I can find make no mention of any commitment to U.S. advisors extending their stay. Nothing but “Rice pudding”, if I may.

Note: State Dept. has “country information” links on page one for: Afghanistan, Iran, Iraq, North Korea, Pakistan, Sudan, but NOT GEORGIA.

…and their Georgia page is mum:

http://www.state.gov/p/eur/ci/gg/

Over at Defense: nothing more than Bush’s “humanitarian assistance” and “strong support”:

http://www.defenselink.mil/news/newsarticle.aspx?id=50879

DoD mentions facts about the humanitaritootin airlift:

http://www.defenselink.mil/news/newsarticle.aspx?id=50855

…but apparently it’s all instantly teleported from Ramstein to Tbilisi, no mention of Batumi, or US air over the Lesser Caucasus, or Turkey…