This was already brought up in the UN Treaty thread. And what happened after Kennedy made his speach at the UN? Nada!!!!!!!! If anything it shows that the UN is an impotent organization. As far as the arguement folks use "see, they have been trying to do this for years", well, duh! No kidding. Folks have been trying to do many different things for years. It didn't happen in 1961 did it? Look, if this has any affect on the US it will be becasue other countries elect to stop exports to the US which they can do with a treaty or without. Whether we sign it or not does not matter.
As far as Kennedy's speach...I personally think it was a bluff. He knew that the USSR and China would never let it pass. This was a political posturing stunt IMO. If you look at Kennedy's overall record on reducing arms he was not a dove. I am not saying he was a Hawk either though.