As Jeff said, please have patience.
For a lot of those that haven't received gifts yet, I've already talked to many of your Secret Santas who have explained to me the reason behind the delay which consist of understandable reasons (family issues, weather, etc.). Is it the best thing ever to have these delays? No. But at least we know they ARE sending. I know it's nice to get your gift by Xmas, but if you don't get it, it's not a huge deal. Please be reasonable.
Red flags aren't put up by Jeff and I until at least a week or two after Christmas. Jeff and I also have personally emailed those we haven't received confirmation from to find out what the hold up is.
Again, have patience. I know you want your gifts. Just bear in mind, there's a lot that goes into this on all parties involved so of course there will be delays. Thank you for your concern though guys.