Today, I finally came across the map Pakistan population density map I was frantic for on the night of October 8th. The version I found is dated October 20th and seems to be credited to the European Commission Joint Research Center. Anne Wright created a Google Earth overlay of it for me so that I can give it out to you. She says, "The placement is a bit crude because it's in the wrong projection," but really the point of it is to get across where the people are in relation to other information about the earthquake. Here it is. And here is a screen shot: