valid point Homepin, that's why I didn't want to launch into it.
I went into iPhoto to investigate a little more:
26.99 each for a calendar and then the postage is the same for one or 20 units there for for 20 calendars the unit cost is $27.40. Then aus post to each person is approx $5 but would have to check, so still around the $33 to $34 to your door.
As for delivery apple need a few weeks for xmas cards but calendars I would have to the end of Nov to submit to Apple at the latest.
Not everyone's thing but just putting it there, so place your votes / support.