Now I think there is still some in the wild, but this is the story of the "last roll made" http://www.kansas.com/2010/07/14/1403115/last-kodachrome-roll-processed.html
so very sad....I learned to shoot 35mm with a handheld meter, just as some of the comments for the article. ; I have been attempting to emulate that with my D80 now...with a bit of success. ; I don't believe my skills would be 10% of what they are without having learned film first.
That's pretty cool that Nat Geo is doing an article on the last roll. ; I'll have to get a copy of that one.