I am hand-waving furiously. I had completely missed the larger implications of the day-length issue, though I have dealt with it on the, erm, day-by-day level. (I'd actually really love to find a...is there a word for biorhythms researcher?...and chat with them about the implications of living permanently on a different day-length. I've always had some odd circadian rhythm issues--I'd be much happier living on 25 hour day, and can do a 26 hour cycle without much difficulty, especially if I don't pay attention to bedtimes--so it's of personal as well as theoretical interest.)