Saw Thoul's post in the getting to know you thread and he said that it was a shame that they never got together to make a third movie. Well, since this topic is outdated, I quickly found this link to a story that I read a while back and thought I'd share.
http://www.comingsoon.net/news/movienews.php?id=81518However, Sigourney Weaver, who was a big part of Ghostbusters had this to say
http://screenrant.com/sigourney-weaver- ... dy-132191/well, its hard to say whether or not Ghostbusters will be making a sequel but recently Ghostbusters had made its way back onto the big screen for a limited screening. So it's hard to say what the future will hold. I just hope they go through with it and hopefully can get everyone back together for a third installment of the series.