I've taken the tour that BengeBoy mentions, and if you are ever visiting the Seattle area, it's well worth the time to make the trek up to Everett for the tour.
Many in my wife's family work at Boeing, so we ocassionally get invited to accompany them to events, family open house days, etc. My father-in-law used to work in the mockup/simulation group before he retired and I once got to fly both the 767 and 747 simulators during a family open house - that was very cool! I'll never forget going to the 777 rollout ceremony, and the "private" tour of the Everett plant with my brother-in-law afterward, that was one heck of a show.
I too am amazed by the Boeing "commute to work month" teams and the miles that they put in. Microsoft also has a couple of teams that put up crazy big numbers...