I just wondered--are you making a new version for Halloween '09?
I recently saw a demonstration of the Hallowindow from a fellow haunter and it looked really good! I myself still need to find a cheap video projector.
I do have one suggestion. One of the best parts of the DVD is the sihlouettes of creatures behind the curtains. I think a DVD with just a loop of different creature sihlouettes would be a hot seller!