Tom P.,
The idea of designing a tough opening hole as a legitmate 19th, where a playoff could be decided, has always fascinated me. It's definitely an old-fashion idea, from an era when match-play was king.
Re tough openings. How about Crystal Downs? The first hole is really tough, principally because of the slope of the green. And, I don't recall the uphill, par-4 second being a slouch either.
A great course though... Crystal Downs.