And latest update...
My flight, ws707 was also cancelled. Gate announcements were that they "could not find a pilot". Delayed, then cancelled. All flights today and tomorrow, apparently, are full now, WS having rebooked the previous two flights on remaining capacity.
Sigh. I was SO hoping that my conscious shift to WS away from AC this year would have been better. As it is, AC just got a full fare one-way fare from me so I can get home.