Have been digging around in this book "Hearing the Changes" that I got some time ago and never got around to looking at until now. It has random nuggets of info on jazz harmony. "Giant Steps" makes a hell of a lot more sense now that I see that it (or the general coltrane-y thing that it uses twice in the first part) kind of falls out of sticking the right V7s between jumping down by major thirds. Also I am amused at the names that get given to certain cliches, like the "Sears Roebuck" bridge from rhythm changes. Ah, "Anthropology".