Well, I've been combing the obfuscated code node for some time looking for inspiration and techniques beyond lack of whitespace and single digit var names. I don't recall if I've had the opportunity to sample some of your techniques, but you can be certain that if anyone has posted code or replies in this node in the last year or so, I've read it.

Your particular obfuscation of the 12 days of christmas stuck out in my mind as it's one of the several that I didn't even attempt to deobfuscate :) As I saw the general form of AM's obfu, it struck me as being familiar. I wondered if it was lifted directly from something else I had read. since there doesn't seem to be much similarity in strings people stick into obfu's for ~tr///, I figured if anything was lifted, that might be the clue.