Lisa, if it's for making uppers, have you tried Cat's Paw, it doesn't smell so bad either, at least not compared with Barge rubber cement.
I just did an experiment with Elmer's Glue, the water-soluble, little kid's kind. It rubs off of smooth leather (like rubber cement) and holds the design marked onto it (like rubber cement).
It took a little longer to dry than rubber cement does and it doesn't hold the design (I use baby powder to mark my designs) quite as good as rubber cement does but it was very close.
I want to get really excited about this idea. Does anyone have some cold hard facts that are going to bring me back down to earth? I really, really hate rubber cement!
Lisa