Crazy coincidence. My folks are in town to visit, and the people next to them on the airplane had read The Cactus Eaters, are from Australia, and (from what i understand) are planning a three-week PCT hike. I hear they are going to write into this blog, and when they do, I'll post the whole thing. By the way, I don't think they actually plan to eat an opuntia. My father explained that he was the "gap-toothed'' paterfamilias featured in the book, and throughout the entire flight, the Australians good-naturedly referred to him as Gappy.
If you hear of any other spontaneous Cactus Eaters themed events, let me know, and I'll post something.