When the Christians looked around for a time to celebrate the birth of the Christ they selected Saturnalia because they could celebrate when others were celebrating Saturnalia and they wouldn't be noticed.

That's an interesting take on the issue. I've certainly noticed the concurrence of "pagan" and Christian holy days, but I always assumed it was a PR move on the Christians' part ("Sure you can still celebrate Saturnalia, just call it Christmas, OK?") rather than camoflage. Is that just your theory, Ted, or do you know it to be the case?