Yeah, for my last release, I used Smashwords and set up as a pre-order every through it, this way the book was already through the pipeline and waiting on release day. It is the only way I know to coordinate releases.
Of course the great and might zon does not let me do that, but their turnaround is usually only a handful of hours (less than 12) so I can work with that. Not sure when their Christmas cut off will be.
In short, push the book asap.
