For those of you who missed it on 5/15/12, Don Wildman (the host), got to go behind the scenes at the Denver mint. They showed how they make the dies, stamped out blanks, etc. Supposed to be a pretty exclusive tour of the production floor, vault, etc. Saw stuff I hadn't seen before. I don't see the episode repeating in the next week, but you might look for it in the near future.
Sounds a lot like what you can see if you take the tour of the floor of the Denver Mint that is arranged by ANA during Summer Seminar.