Whew, I think I've finally got it, so here's the last batch I'm giving up (at least for now). The following will be cancelled at noon ET today. All for parties of three ...
Dec. 13, 7:20 PM: dinner @ Jiko
Dec. 13, 7:30 PM: dinner @ Artist Point
Dec. 14, 7:40 AM: character breakfast @ 'Ohana
Dec. 15, 4:00 PM: dinner @ La Hacienda de San Angel
I think it takes a lot of patience and persistence (and likely a little OCD doesn't hurt), but I eventually got everything we wanted, including some of the hard-to-get "name" places, pretty much at the time we wanted (within an hour's range), even starting so "late" at five months out. Still, knowing where you're going to be for lunch, six months in advance, while on vacation to a place you've never been is, well, odd.
UPDATE: All reservations listed above have now been cancelled.