I was initially commenting on this thread simply because I happened to notice it while perusing PC. But while we're talking about it, I feel like it would make more sense to trim the list down a little prior to additions. There are probably expressions on there which aren't as relevant as they once were (i.e. how many people say "Tell it to the hand" these days?)
I don't really care one way or another, though. It's a tiny part of the whole PC experience.