FLIT says the Russian response to the Arab/Chechen terrorists gives nerve gas a PR boost. No, really. He regards the use as a success of sorts, as do I. The bigger problem was being unprepared to deal with the aftermath, and unable or unwilling to give the doctors sufficient information to treat the victims.
Have you noticed, by the way, that nobody much is complaining about the fact that the Russians seem to have shot the terrorists in the head while they were unconscious from the gas?
UDPATE: James Robbins comments on the shootings in this generally supportive piece.