Been into coking Thai recently and got most of the stuff-live near a Thai grocery (like fresh turmeric).
Keller's French L. book, though, has a recipe with fresh hearts of palm. No way in hell am I gonna order that.
Think of other ridiculously rare called-for ingredients? Is it just obnoxious for these guys to stick them in? I make an exception for ethnic recipes for some reason. I figure it's obvious they cook with unusual foods. But otherwise, give me a break.