Is it possible that some of the people have not acknowledged their gifts because they haven't received them? I personally have only received one of my two. I have acknowledged the one I did receive. Maybe the people who have not received acknowledgement should send a PM to the recipients and double check to see if the presents arrived. As much as I love presents and surprises (a lot!) I tend to be more on the "it is more fun to give" end of the presents spectrum, and am not particularly upset about not receiving a second present. I would feel horrible however if someone thought I was just not thanking them because I couldn't be bothered.

Well, I am off now to a fifth and final round of Christmas exchange with friends and family....And then to sleep for about a week or so.